CELLECTIS S.A. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line Label Object Class Period Type Balance Report ElementName
1 1001 - Document - Document and Entity Information Network

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 http://www.cellectis.com/taxonomy/role/DocumentandEntityInformation
2 Implied Table Table

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3 Document - Document and Entity Information [Abstract] Abstract clls:DocumentandEntityInformationAbstract
4 Document Type Concept (Submission Type) For Period dei:DocumentType
5 Amendment Flag Concept (Yes/No) For Period dei:AmendmentFlag
6 Document Period End Date Concept (Date) For Period dei:DocumentPeriodEndDate
7 Document Fiscal Year Focus Concept (Year) For Period dei:DocumentFiscalYearFocus
8 Document Fiscal Period Focus Concept (Fiscal Period) For Period dei:DocumentFiscalPeriodFocus
9 Trading Symbol Concept (Text/String) For Period dei:TradingSymbol
10 Entity Registrant Name Concept (Text/String) For Period dei:EntityRegistrantName
11 Entity Central Index Key Concept (CIK Number) For Period dei:EntityCentralIndexKey
12 Current Fiscal Year End Date Concept (Month/Day) For Period dei:CurrentFiscalYearEndDate
13 Entity Well-known Seasoned Issuer Concept (Yes/No) For Period dei:EntityWellKnownSeasonedIssuer
14 Entity Current Reporting Status Concept (Yes/No) For Period dei:EntityCurrentReportingStatus
15 Entity Filer Category Concept (Filer Category) For Period dei:EntityFilerCategory
16 Entity Common Stock, Shares Outstanding Concept (Shares) As Of dei:EntityCommonStockSharesOutstanding
17 1003 - Statement - Statements of Consolidated Financial Position Network

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 http://www.cellectis.com/taxonomy/role/StatementOfFinancialPositionCurrentNonCurrent-210000
18 Implied Table Table

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19 Statement of financial position [abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
20 ASSETS Abstract ifrs-full:AssetsAbstract
21 Non-current assets Abstract ifrs-full:NoncurrentAssetsAbstract
22 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
23 Property, plant, and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
24 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
25 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
26 Current assets Abstract ifrs-full:CurrentAssetsAbstract
27 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
28 Trade receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
29 Subsidies receivables Concept (Monetary) As Of Debit clls:CurrentSubsidiesReceivables
30 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
31 Current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
32 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
33 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
34 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
35 LIABILITIES Abstract ifrs-full:LiabilitiesAbstract
36 Shareholders' equity Abstract ifrs-full:EquityAbstract
37 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
38 Premiums related to the share capital Concept (Monetary) As Of Credit ifrs-full:SharePremium
39 Treasury share reserve Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
40 Currency translation adjustment Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
41 Retained earnings (deficit) Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
42 Net income (loss) Concept (Monetary) As Of Credit clls:NetIncomeLossCapitalizedToStockholders
43 Total shareholders' equity - Group Share Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
44 Non-controlling interests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
45 Total shareholders' equity Concept (Monetary) As Of Credit ifrs-full:Equity
46 Non-current liabilities Abstract ifrs-full:NoncurrentLiabilitiesAbstract
47 Non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
48 Non-current provisions Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
49 Total non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
50 Current liabilities Abstract ifrs-full:CurrentLiabilitiesAbstract
51 Current financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
52 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
53 Deferred revenues and contract liabilities Concept (Monetary) As Of Credit clls:DeferredRevenuesAndContractLiabilities
54 Current provisions Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
55 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
56 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
57 TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
58 1004 - Statement - Statements of Consolidated Operations Network

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 http://www.cellectis.com/taxonomy/role/StatementOfComprehensiveIncomeProfitOrLossByFunctionOfExpense-310000
59 Implied Table Table

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60 Profit or loss [abstract] Abstract ifrs-full:IncomeStatementAbstract
61 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
62 Other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
63 Total revenues and other income Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
64 Operating expenses Abstract ifrs-full:ProfitLossAbstract
65 Royalty expenses Concept (Monetary) For Period Debit ifrs-full:RoyaltyExpense
66 Research and development expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
67 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
68 Other operating income (expenses) Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
69 Total operating expenses Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
70 Operating income (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
71 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
72 Financial expenses Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
73 Financial gain (loss) Concept (Monetary) For Period Credit clls:FinancialGainLoss
74 Income tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
75 Net income (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
76 Attributable to shareholders of Cellectis Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
77 Attributable to non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
78 Basic / Diluted net income (loss) per share attributable to shareholders of Cellectis Abstract ifrs-full:EarningsPerShareAbstract
79 Basic net income (loss) per share ($ /share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
80 Diluted net income (loss) per share ($ /share) Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
81 1005 - Statement - Statements of Consolidated Comprehensive Income (Loss) Network

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 http://www.cellectis.com/taxonomy/role/StatementOfComprehensiveIncomeOCIComponentsPresentedNetOfTax-410000
82 Implied Table Table

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83 Statement of comprehensive income [abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
84 Net income (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
85 Actuarial gains and losses Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
86 Other comprehensive income (loss) that will not be reclassified subsequently to income or loss Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossBeforeTax
87 Currency translation adjustment Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxExchangeDifferencesOnTranslation
88 Other comprehensive income (loss) that will be reclassified subsequently to income or loss Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTax
89 Total comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
90 Attributable to shareholders of Cellectis Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
91 Attributable to non-controlling interests Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToNoncontrollingInterests
92 1006 - Statement - Statements of Consolidated Cash Flows Network

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 http://www.cellectis.com/taxonomy/role/StatementOfCashFlowsIndirectMethod-520000
93 Implied Table Table

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94 Statement of cash flows [abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
95 Cash flows from operating activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
96 Net loss for the period Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
97 Reconciliation of net loss and of the cash provided by (used in) operating activities Adjustments for Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
98 Amortization and depreciation Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
99 Net loss (income) on disposals Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForGainLossOnDisposalsPropertyPlantAndEquipment
100 Net financial loss (gain) Concept (Monetary) For Period Credit clls:FinancialGainLoss
101 Expenses related to share-based payments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
102 Provisions Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForProvisions
103 Other non cash items Concept (Monetary) For Period Debit ifrs-full:OtherAdjustmentsForNoncashItems
104 Interest (paid) / received Concept (Monetary) For Period Debit ifrs-full:InterestReceivedClassifiedAsOperatingActivities
105 Operating cash flows before change in working capital Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital
106 Decrease (increase) in inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
107 Decrease (increase) in trade receivables and other current assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
108 Decrease (increase) in subsidies receivables Concept (Monetary) For Period Debit clls:AdjustmentsForDecreaseIncreaseInSubsidiesReceivables
109 (Decrease) increase in trade payables and other current liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
110 (Decrease) increase in deferred income and contract liabilities Concept (Monetary) For Period Debit clls:AdjustmentsForIncreaseDecreaseInDeferredIncomeAndContractLiabilities
111 Change in working capital Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
112 Net cash flows provided by (used in) operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
113 Cash flows from investment activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
114 Proceeds from disposal of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
115 Acquisition of intangible assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
116 Acquisition of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
117 Net change in non-currentfinancial assets Concept (Monetary) For Period Credit clls:CashFlowsFromNetChangeInNonCurrentFinancialAssets
118 Sale (Acquisition) of current financial assets Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromLosingControlOfSubsidiariesOrOtherBusinessesClassifiedAsInvestingActivities
119 Net cash flows provided by (used in) investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
120 Cash flows from financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
121 Increase in share capital net of transaction costs Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssuingShares
122 Shares of Calyxt issued to third parties Concept (Monetary) For Period Debit ifrs-full:ProceedsFromChangesInOwnershipInterestsInSubsidiaries
123 Decrease in borrowings Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
124 Treasury shares Concept (Monetary) For Period Debit clls:ProceedsFromPaymentsForSaleOrIssueOfTreasuryShares
125 Net cash flows provided by financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
126 (Decrease) increase in cash Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
127 Cash and cash equivalents at the beginning of the year Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
128 Effect of exchange rate changes on cash Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
129 Cash and cash equivalents at the end of the period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
130 1007 - Statement - Statements of Changes in Consolidated Shareholders' Equity Network

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 http://www.cellectis.com/taxonomy/role/StatementOfChangesInEquity-610000
131 Statement [Table] Table

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132 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
133 Income (Loss) [member] Member ifrs-full:EquityMember
134 Share Capital Ordinary Shares [member] Member ifrs-full:OrdinarySharesMember
135 Premiums Related to Share Capital [member] Member ifrs-full:SharePremiumMember
136 Treasury Shares [member] Member ifrs-full:TreasurySharesMember
137 Currency Translation Adjustment [member] Member clls:CurrencyTranslationAdjustmentMember
138 Retained Earnings (Deficit) [member] Member ifrs-full:RetainedEarningsMember
139 Income (Loss) [member] Member ifrs-full:AccumulatedOtherComprehensiveIncomeMember
140 Attributable to Shareholders of Cellectis [member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
141 Non controlling Interests [member] Member ifrs-full:NoncontrollingInterestsMember
142 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
143 Beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
144 Beginning balance, shares Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
145 Net Loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
146 Other comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
147 Total comprehensive income (loss) Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
148 Allocation of prior period loss Concept (Monetary) For Period Credit clls:AllocationOfPriorPeriodLoss
149 Capital Increase Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransactionsWithOwners
150 Capital Increase, Shares Concept (Shares) For Period clls:IncreaseDecreaseThroughTransactionsWithOwnersShares
151 Transaction with subsidiaries Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughChangeInEquityOfSubsidiaries
152 Treasury shares Concept (Monetary) For Period Credit ifrs-full:SaleOrIssueOfTreasuryShares
153 Exercise of share warrants and employee warrants Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
154 Exercise of share warrants and employee warrants, amount Concept (Monetary) For Period ifrs-full:ExercisePriceShareOptionsGranted
155 Exercise of share warrants and employee warrants, shares Concept (Shares) For Period clls:ExerciseOfShareWarrantsAndEmployeeWarrantsShares
156 Non-cash stock-based compensation expense Concept (Monetary) As Of Credit ifrs-full:ReserveOfSharebasedPayments
157 Share based compensation Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
158 Other movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
159 Balance at end of year Concept (Monetary) As Of Credit ifrs-full:Equity
160 Ending balance, shares Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
161 1008 - Statement - Statements of Changes in Consolidated Shareholders' Equity (Parenthetical) Network

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 http://www.cellectis.com/taxonomy/role/StatementOfChangesInEquity-610000Parenthetical
162 Statement [Table] Table

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163 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
164 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
165 Calyxt Inc [member] Member clls:CalyxtIncMember
166 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
167 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
168 Cellectis [member] Member clls:CellectisMember
169 Statement of changes in equity [line items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
170 Ordinary shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
171 Selling price per common share Concept (Share) For Period clls:CashPricePerOrdinaryShare
172 Common stock for exercising underwriters' option Concept (Shares) As Of clls:CommonStockSharesIssuedToUnderwriters
173 Gross proceeds Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfOrdinaryShares
174 Underwriting discounts and commissions Concept (Monetary) For Period Debit clls:UnderwritingDiscountsAndCommissions
175 Offering expense Concept (Monetary) For Period Debit clls:OfferingExpense
176 Other offering expense Concept (Monetary) For Period Debit clls:OtherOfferingExpense
177 Purchase of common stock Concept (Shares) For Period clls:NumberOfOrdinarySharesRepurchased
178 Non-controlling shareholders interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
179 Purchase of common stock, value Concept (Monetary) For Period Debit clls:ValueOfOrdinarySharesRepurchased
180 Percentage of interest attributable to parent Concept (Percent) As Of clls:MinorityInterestOwnershipPercentageByParent1
181 Number of stock options exercised Concept (Shares) For Period clls:NumberOfOptionsExercised
182 Equity value Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
183 Stock options exercised, value Concept (Monetary) For Period Credit clls:StockOptionExercised
184 Purchase price Concept (Monetary) As Of Debit clls:PurchasePrice
185 Purchase of common shares Concept (Shares) For Period clls:NumberOfSharesPurchased
186 Purchase of common shares price per share Concept (Share) As Of clls:SharesPurchasedPricePerShare
187 Purchase of common stock, value Concept (Share) As Of clls:ValueOfSharesPurchased
188 1009 - Disclosure - The Company Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfActivitiesOfCompanyExplanatory
189 Implied Table Table

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190 Text block1 [abstract] Abstract clls:TextBlock1Abstract
191 The Company Concept (Text Block (HTML)) For Period clls:DisclosureOfActivitiesOfCompanyExplanatory
192 1010 - Disclosure - Accounting principles Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfAccountingJudgementsAndEstimatesExplanatory
193 Implied Table Table

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194 Text block1 [abstract] Abstract clls:TextBlock1Abstract
195 Accounting principles Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
196 1011 - Disclosure - Information concerning the Group's Consolidated Operations Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfBasisOfConsolidationExplanatory
197 Implied Table Table

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198 Text block1 [abstract] Abstract clls:TextBlock1Abstract
199 Information concerning the Group's Consolidated Operations Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfConsolidationExplanatory
200 1012 - Disclosure - Impairment tests Network

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201 Implied Table Table

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202 Text block1 [abstract] Abstract clls:TextBlock1Abstract
203 Impairment tests Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfImpairmentOfAssetsExplanatory
204 1013 - Disclosure - Intangible assets Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfIntangibleAssetsExplanatory
205 Implied Table Table

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206 Text block1 [abstract] Abstract clls:TextBlock1Abstract
207 Intangible assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIntangibleAssetsExplanatory
208 1014 - Disclosure - Property, plant and equipment Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfPropertyPlantAndEquipmentExplanatory
209 Implied Table Table

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210 Text block1 [abstract] Abstract clls:TextBlock1Abstract
211 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
212 1015 - Disclosure - Financial assets and liabilities Network

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213 Implied Table Table

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214 Text block1 [abstract] Abstract clls:TextBlock1Abstract
215 Financial assets and liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFairValueOfFinancialAssetsAndFinancialLiabilitiesAndReclassificationExplanatory
216 1016 - Disclosure - Inventories Network

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217 Implied Table Table

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218 Text block1 [abstract] Abstract clls:TextBlock1Abstract
219 Inventories Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
220 1017 - Disclosure - Trade receivables and other current assets Network

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221 Implied Table Table

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223 Trade receivables and other current assets Concept (Text Block (HTML)) For Period clls:TradeReceivablesAndOtherCurrentAssetsExplanatory
224 1018 - Disclosure - Current financial assets and Cash and cash equivalents Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfFinancialInstrumentsExplanatory
225 Implied Table Table

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226 Text block1 [abstract] Abstract clls:TextBlock1Abstract
227 Current financial assets and Cash and cash equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
228 1019 - Disclosure - Financial liabilities Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfDetailedFinancialLiabilitiesExplanatory
229 Implied Table Table

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230 Text block1 [abstract] Abstract clls:TextBlock1Abstract
231 Financial liabilities Concept (Text Block (HTML)) For Period clls:DisclosureOfDetailedFinancialLiabilitiesExplanatory
232 1020 - Disclosure - Other current liabilities Network

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233 Implied Table Table

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234 Text block1 [abstract] Abstract clls:TextBlock1Abstract
235 Other current liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherCurrentLiabilitiesExplanatory
236 1021 - Disclosure - Deferred revenues and contract liabilities Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfDeferredRevenuesAndContractLiabilitiesExplanatory
237 Implied Table Table

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238 Text block1 [abstract] Abstract clls:TextBlock1Abstract
239 Deferred revenues and contract liabilities Concept (Text Block (HTML)) For Period clls:DisclosureOfDeferredRevenuesAndContractLiabilitiesExplanatory
240 1022 - Disclosure - Capital Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
241 Implied Table Table

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242 Text block1 [abstract] Abstract clls:TextBlock1Abstract
243 Capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfShareCapitalReservesAndOtherEquityInterestExplanatory
244 1023 - Disclosure - Share-based payments Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfSharebasedPaymentArrangementsExplanatory
245 Implied Table Table

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246 Text block1 [abstract] Abstract clls:TextBlock1Abstract
247 Share-based payments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSharebasedPaymentArrangementsExplanatory
248 1024 - Disclosure - Earnings per share Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfEarningsPerShareExplanatory
249 Implied Table Table

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250 Text block1 [abstract] Abstract clls:TextBlock1Abstract
251 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEarningsPerShareExplanatory
252 1025 - Disclosure - Provisions Network

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253 Implied Table Table

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255 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProvisionsExplanatory
256 1026 - Disclosure - Commitments Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfCommitmentsExplanatory
257 Implied Table Table

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259 Commitments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCommitmentsExplanatory
260 1027 - Disclosure - Related parties Network

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261 Implied Table Table

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263 Related parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRelatedPartyExplanatory
264 1028 - Disclosure - Subsequent events Network

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265 Implied Table Table

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266 Text block1 [abstract] Abstract clls:TextBlock1Abstract
267 Subsequent events Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfEventsAfterReportingPeriodExplanatory
268 1029 - Disclosure - Accounting principles (Policies) Network

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 http://www.cellectis.com/taxonomy/role/NotesToFinancialStatementsDisclosureOfAccountingJudgementsAndEstimatesExplanatoryPolicies
269 Implied Table Table

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271 Basis for preparation Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForBasisOfPreparationOfFinancialStatementsExplanatory
272 Change in the presentation currency of the financial statements Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForFunctionalAndPresentationCurrencyExplanatory
273 Basis of consolidation Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForBasisOfConsolidationExplanatory
274 Foreign currency Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
275 Use of judgment, estimates and assumptions Concept (Text Block (HTML)) For Period clls:DisclosureOfAccountingPolicyForChangesInAccountingEstimatesExplanatory
276 Revenues and other income Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
277 Operating expenses Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForExpensesExplanatory
278 Financial income and expenses Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinanceIncomeAndCostsExplanatory
279 Income tax Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
280 Reportable segments Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
281 Impairment tests Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
282 Intangible assets Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForIntangibleAssetsExplanatory
283 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
284 Financial assets and liabilities Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForFinancialAssetsLiabilitiesExplanatory
285 Inventories Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForInventoriesExplanatory
286 Current financial assets Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForCurrentFinancialAssetsExplanatory
287 Cash and cash equivalents Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForCashAndCashEquivalentsExplanatory
288 Deferred revenues and contract liabilities Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForDeferredRevenuesAndContractLiabilitiesExplanatory
289 Share capital issued Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIssuedCapitalExplanatory
290 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
291 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
292 Commitments Concept (Text Block (HTML)) For Period clls:DescriptionOfAccountingPolicyForCommitmentsExplanatory
293 1030 - Disclosure - Accounting principles (Tables) Network

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294 Implied Table Table

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295 Text block1 [abstract] Abstract clls:TextBlock1Abstract
296 Summary of Presentation Currency of the Financial Statements Concept (Text Block (HTML)) For Period clls:DisclosureOfDetailedInformationOnShareCapitalExplanatory
297 Summary of Net Income (Loss) Concept (Text Block (HTML)) For Period clls:DisclosureOfProfitLossAttributableToOwnersOfParentExplanatory
298 Summary of Revenue from Contract with Customers of the Financial Statements Concept (Text Block (HTML)) For Period ifrs-full:ExplanationOfSignificantChangesInContractAssetsAndContractLiabilitiesExplanatory
299 1031 - Disclosure - Information concerning the Group's Consolidated Operations (Tables) Network

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300 Implied Table Table

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301 Text block1 [abstract] Abstract clls:TextBlock1Abstract
302 Revenues By Country of Origin and Other Income Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfRevenueExplanatory
303 Revenues by Nature Concept (Text Block (HTML)) For Period clls:DisclosureOfRevenueByNatureExplanatory
304 Details of Operating Expenses by Nature Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfExpensesByNatureExplanatory
305 Details of Financial Income and Expenses Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory
306 Disclosure of Income Tax (Expense or Income) Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfIncomeTaxExplanatory
307 Disclosure of Deferred Tax Assets and Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDeferredTaxesExplanatory
308 Summary of Key Performance Indicators by Reportable Segments Concept (Text Block (HTML)) For Period clls:DisclosureOfKeyPerformanceIndicatorsByReportableSegmentsExplanatory
309 Summary of Reconciliation of Plant Segment Result of Operations Concept (Text Block (HTML)) For Period clls:DisclosureOfReconciliationOfPlantSegmentResultOfOperationsExplanatory
310 1032 - Disclosure - Intangible assets (Tables) Network

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311 Implied Table Table

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312 Text block1 [abstract] Abstract clls:TextBlock1Abstract
313 Details Information About Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
314 1033 - Disclosure - Property, plant and equipment (Tables) Network

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315 Implied Table Table

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316 Text block1 [abstract] Abstract clls:TextBlock1Abstract
317 Summary of Property Plant and Equipment Estimated Useful Lives Concept (Text Block (HTML)) For Period clls:DisclosureOfPropertyPlantAndEquipmentEstimatedUsefulLivesExplanatory
318 Details of Property, Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
319 Details of Finance Lease Concept (Text Block (HTML)) For Period clls:DisclosureOfDetailedInformationAboutFinanceLeaseExplanatory
320 1034 - Disclosure - Financial assets and liabilities (Tables) Network

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321 Implied Table Table

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322 Text block1 [abstract] Abstract clls:TextBlock1Abstract
323 Summary of Financial Assets and Liabilities Concept (Text Block (HTML)) For Period clls:DisclosureOfDetailedInformationAboutFinancialAssetsAndLiabilitiesExplanatory
324 Summary of Derivative Financial Instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDerivativeFinancialInstrumentsExplanatory
325 1035 - Disclosure - Trade receivables and other current assets (Tables) Network

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326 Implied Table Table

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327 Text block1 [abstract] Abstract clls:TextBlock1Abstract
328 Disclosure of Trade Receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
329 Disclosure of Subsidies Receivables Concept (Text Block (HTML)) For Period clls:DisclosureOfAgedAnalysisOfTradeReceivablesNetOfAllowancesExplanatory
330 Disclosure of Other Current Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherCurrentAssetsExplanatory
331 1036 - Disclosure - Current financial assets and Cash and cash equivalents (Tables) Network

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332 Implied Table Table

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333 Text block1 [abstract] Abstract clls:TextBlock1Abstract
334 Summary of Current Financial Assets and Cash and Cash Equivalents Concept (Text Block (HTML)) For Period clls:DisclosureOfCurrentFinancialAssetsAndCashAndCashEquivalentsExplanatoryTextBlock
335 Details of Cash and Cash Equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
336 1037 - Disclosure - Financial liabilities (Tables) Network

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337 Implied Table Table

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338 Text block1 [abstract] Abstract clls:TextBlock1Abstract
339 Detail of financial liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
340 Due dates of the financial liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesExplanatory
341 1038 - Disclosure - Other current liabilities (Tables) Network

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342 Implied Table Table

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343 Text block1 [abstract] Abstract clls:TextBlock1Abstract
344 Summary of Other Current Liabilities Concept (Text Block (HTML)) For Period clls:DisclosureOfDetailedInformationAboutOtherCurrentLiabilitiesExplanatory
345 1039 - Disclosure - Deferred revenues and contract liabilities (Tables) Network

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346 Implied Table Table

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347 Text block1 [abstract] Abstract clls:TextBlock1Abstract
348 Details of Deferred Revenues and Contract Liabilities Concept (Text Block (HTML)) For Period clls:DisclosureOfDetailedInformationAboutDeferredRevenuesAndContractLiabilitiesExplanatory
349 1040 - Disclosure - Capital (Tables) Network

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350 Implied Table Table

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351 Text block1 [abstract] Abstract clls:TextBlock1Abstract
352 Schedule of Classes of Share Capital Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
353 Schedule of Share Warrants and Non-employee Warrants Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementExplanatory
354 Schedule of Information Relating to Subsidiaries that Reported Non-Controlling Interest Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNoncontrollingInterestsExplanatory
355 1041 - Disclosure - Share-based payments (Tables) Network

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356 Statement [Table] Table

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 us-gaap:StatementTable
357 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
358 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
359 Stock options [member] Member clls:StockOption1Member
360 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
361 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
362 Equity awards [member] Member clls:EquityAwardsMember
363 Stock options [member] Member clls:StockOption1Member
364 Warrants [member] Member clls:WarrantsMember
365 S A free shares [member] Member clls:SAFreeSharesMember
366 Calyxt Inc. [member] Member clls:CalyxtMember
367 Statement [Line Items] LineItems us-gaap:StatementLineItems
368 Summary of Number of Shares Outstanding and Weighted Average Grant Date Fair Value Concept (Text Block (HTML)) For Period clls:DisclosureOfNumberAndWeightedAverageGrantDateFairValueOfSharesOutstandingExplanatory
369 Summary of Vesting Details Concept (Text Block (HTML)) For Period clls:DisclosureOfDetailedInformationAboutShareBasedPaymentArrangementsTextBlock
370 Summary of Information on Stock Option Activity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
371 Summary of Weighted-average Fair Values of Warrants Granted and Assumptions Used for Black-Scholes Option Pricing Model Concept (Text Block (HTML)) For Period clls:DisclosureOfAssumptionsUsedToEstimateFairValueOfWarrantsExplanatory
372 1042 - Disclosure - Earnings per share (Tables) Network

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373 Implied Table Table

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374 Text block1 [abstract] Abstract clls:TextBlock1Abstract
375 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
376 1043 - Disclosure - Provisions (Tables) Network

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377 Implied Table Table

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378 Text block1 [abstract] Abstract clls:TextBlock1Abstract
379 Details of Provisions Concept (Text Block (HTML)) For Period clls:DisclosureOfDetailedInformationAboutProvisionsExplanatory
380 Schedule of Estimation of Retirement Indemnity to Employee Concept (Text Block (HTML)) For Period clls:DisclosureOfEstimationOfRetirementIndemnityToEmployeeExplanatory
381 Summary of Net Defined Benefit Liability and Components Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetExplanatory
382 1044 - Disclosure - Commitments (Tables) Network

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383 Implied Table Table

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384 Text block1 [abstract] Abstract clls:TextBlock1Abstract
385 Details of commitments Concept (Text Block (HTML)) For Period clls:DisclosureOfScheduleOfCommitmentsExplanatory
386 1045 - Disclosure - Accounting Principles - Additional Information (Detail) Network

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387 Disclosure of changes in accounting estimates [table] Table

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388 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
389 Consolidated [member] Member ifrs-full:ConsolidatedMember
390 Adjustments [member] Member clls:AdjustmentsMember
391 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
392 Restated [member] Member ifrs-full:RestatedMember
393 Increase (Decrease) Due to Application of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
394 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
395 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
396 Cellectis [member] Member clls:CellectisMember
397 Calyxt Inc [member] Member clls:CalyxtIncMember
398 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
399 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
400 Cellectis [member] Member clls:CellectisMember
401 Range [axis] Axis ifrs-full:RangeAxis
402 Ranges [member] Member ifrs-full:RangesMember
403 Bottom of Range [member] Member ifrs-full:BottomOfRangeMember
404 Top of Range [member] Member ifrs-full:TopOfRangeMember
405 Disclosure of changes in accounting estimates [line items] LineItems ifrs-full:DisclosureOfChangesInAccountingEstimatesLineItems
406 Increase in right of used assets Concept (Monetary) For Period Credit ifrs-full:RightofuseAssetsIncreaseDecreaseInRevaluationSurplus
407 Equity adjustment Concept (Monetary) As Of Credit ifrs-full:Equity
408 Ownership interest in subsidiary Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestInSubsidiary
409 Gross proceeds Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfOrdinaryShares
410 Common stock sold Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
411 Par value per share Concept (Share) As Of ifrs-full:ParValuePerShare
412 Shares to underwriters Concept (Monetary) As Of Credit clls:CommonStockIssuedToUnderwriters
413 Selling price per common share Concept (Share) For Period clls:CashPricePerOrdinaryShare
414 Common stock for exercising underwriters' option Concept (Shares) As Of clls:CommonStockSharesIssuedToUnderwriters
415 Underwriting discounts and commissions Concept (Monetary) For Period Debit clls:UnderwritingDiscountsAndCommissions
416 Offering expense Concept (Monetary) For Period Debit clls:OfferingExpense
417 Purchase of common stock Concept (Shares) For Period clls:NumberOfOrdinarySharesRepurchased
418 Purchase of common stock, value Concept (Monetary) For Period Debit clls:ValueOfOrdinarySharesRepurchased
419 Number of subsidiaries Concept (Integer) For Period clls:NumberOfSubsidiaries
420 Non-controlling shareholders interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
421 1046 - Disclosure - Accounting Principles - Summary of Presentation Currency of the Financial Statements (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureAccountingPrinciplesSummaryOfPresentationCurrencyOfTheFinancialStatements
422 Disclosure of classes of share capital [table] Table

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 ifrs-full:DisclosureOfClassesOfShareCapitalTable
423 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
424 Consolidated [member] Member ifrs-full:ConsolidatedMember
425 Consolidated Financial Statement as Reported [member] Member clls:ConsolidatedFinancialStatementReportedMember
426 Adjustments [member] Member clls:AdjustmentsMember
427 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
428 Total non-currentassets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
429 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
430 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
431 Capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
432 Premiums, Retained earnings (deficit) and Net income (loss) Concept (Monetary) As Of Credit clls:SharePremiumsRetainedEarningsAndNetIncome
433 Treasury share reserve Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
434 Currency translation adjustment Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
435 Total shareholders' equity - Group Share Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
436 Non-controllinginterests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
437 Total shareholders' equity Concept (Monetary) As Of Credit ifrs-full:Equity
438 Total non-currentliabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
439 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
440 TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
441 1047 - Disclosure - Accounting Principles - Summary of Presentation Currency of the Financial Statements (Parenthetical) (Detail) Network

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442 Implied Table Table

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443 Reconciliation of number of shares outstanding [abstract] Abstract ifrs-full:ReconciliationOfNumberOfSharesOutstandingAbstract
444 Closing daily reference exchange rate Concept (Decimal) As Of ifrs-full:ClosingForeignExchangeRate
445 1048 - Disclosure - Accounting Principles - Summary of Net Income (Loss) (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureAccountingPrinciplesSummaryOfNetIncomeLoss
446 Disclosure of classes of share capital [table] Table

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 ifrs-full:DisclosureOfClassesOfShareCapitalTable
447 Consolidated and separate financial statements [axis] Axis ifrs-full:ConsolidatedAndSeparateFinancialStatementsAxis
448 Consolidated [member] Member ifrs-full:ConsolidatedMember
449 Consolidated Financial Statement as Reported [member] Member clls:ConsolidatedFinancialStatementReportedMember
450 Adjustments [member] Member clls:AdjustmentsMember
451 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
452 Total revenues and other income Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
453 Total operating expenses Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
454 Operating income (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
455 Financial gain (loss) Concept (Monetary) For Period Credit clls:FinancialGainLoss
456 Income tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
457 Income (loss) from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
458 Loss from discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
459 Net income (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
460 1049 - Disclosure - Accounting Principles - Summary of Net Income (Loss) (Parenthetical) (Detail) Network

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461 Implied Table Table

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462 Reconciliation of number of shares outstanding [abstract] Abstract ifrs-full:ReconciliationOfNumberOfSharesOutstandingAbstract
463 Average reference exchange rate Concept (Decimal) For Period ifrs-full:AverageForeignExchangeRate
464 1050 - Disclosure - Accounting Principles - Summary of Revenue from Contract with Customers of the Financial Statements (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureAccountingPrinciplesSummaryOfRevenueFromContractWithCustomersOfTheFinancialStatements
465 Disclosure of classes of share capital [table] Table

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466 Retrospective application and retrospective restatement [axis] Axis ifrs-full:RetrospectiveApplicationAndRetrospectiveRestatementAxis
467 Restated [member] Member ifrs-full:RestatedMember
468 Previously stated [member] Member ifrs-full:PreviouslyStatedMember
469 Increase (Decrease) Due to Application of IFRS 15 [member] Member ifrs-full:IncreaseDecreaseDueToApplicationOfIFRS15Member
470 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
471 Income (Loss) [member] Member ifrs-full:EquityMember
472 Share Capital Ordinary Shares [member] Member ifrs-full:OrdinarySharesMember
473 Premiums Related to Share Capital [member] Member ifrs-full:SharePremiumMember
474 Treasury Shares [member] Member ifrs-full:TreasurySharesMember
475 Currency Translation Adjustment [member] Member clls:CurrencyTranslationAdjustmentMember
476 Retained Earnings (Deficit) [member] Member ifrs-full:RetainedEarningsMember
477 Income (Loss) [member] Member ifrs-full:AccumulatedOtherComprehensiveIncomeMember
478 Attributable to Shareholders of Cellectis [member] Member ifrs-full:EquityAttributableToOwnersOfParentMember
479 Non controlling Interests [member] Member ifrs-full:NoncontrollingInterestsMember
480 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
481 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
482 Deferred revenues and contract liabilities Concept (Monetary) As Of Credit clls:DeferredRevenuesAndContractLiabilities
483 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
484 Total Deferred revenue and contract liabilities Concept (Monetary) As Of Credit clls:DeferredRevenuesAndContractLiabilities
485 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
486 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
487 Premiums related to the share capital Concept (Monetary) As Of Credit ifrs-full:SharePremium
488 Treasury share reserve Concept (Monetary) As Of Debit ifrs-full:TreasuryShares
489 Currency translation adjustment Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
490 Retained earnings (deficit) Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
491 Net income (loss) Concept (Monetary) As Of Credit clls:NetIncomeLossCapitalizedToStockholders
492 Total shareholders' equity - Group Share Concept (Monetary) As Of Credit ifrs-full:EquityAttributableToOwnersOfParent
493 Non-controllinginterests Concept (Monetary) As Of Credit ifrs-full:NoncontrollingInterests
494 Equity Concept (Monetary) As Of Credit ifrs-full:Equity
495 Total non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
496 Equity, shares Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
497 Current liabilities Abstract ifrs-full:CurrentLiabilitiesAbstract
498 Current financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
499 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayablesToTradeSuppliers
500 Deferred revenues and contract liabilities Concept (Monetary) As Of Credit clls:DeferredRevenuesAndContractLiabilities
501 Current provisions Concept (Monetary) As Of Credit ifrs-full:CurrentProvisions
502 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
503 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
504 TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
505 1051 - Disclosure - Information Concerning the Group's Consolidated Operations - Revenues by Country of Origin and Other Income (Detail) Network

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506 Disclosure of Revenue [Table] Table

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507 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
508 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
509 France [member] Member country:FR
510 United States [member] Member country:US
511 Disclosure of revenue [line items] LineItems clls:DisclosureOfRevenueLineItems
512 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
513 Research tax credit Concept (Monetary) For Period Credit clls:ResearchTaxCreditAmount
514 Subsidies and other Concept (Monetary) For Period Credit ifrs-full:OtherRevenue
515 Other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
516 Total revenues and other income Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
517 1052 - Disclosure - Information Concerning the Group's Consolidated Operations - Revenues by Nature (Detail) Network

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518 Disclosure of Revenue [Table] Table

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519 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
520 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
521 Calyxt Inc and Cellectis BioResearch Inc [member] Member clls:CalyxtIncAndCellectisBioResearchIncMember
522 Disclosure of revenue [line items] LineItems clls:DisclosureOfRevenueLineItems
523 Recognition of previously deferred upfront payments Concept (Monetary) For Period Credit clls:UpfrontsRevenue
524 Other revenues Concept (Monetary) For Period Credit ifrs-full:OtherRevenue
525 Collaboration agreements Concept (Monetary) For Period Credit clls:RevenueFromCollaborationAgreements
526 Licenses Concept (Monetary) For Period Credit ifrs-full:LicenceFeeIncome
527 Products & services Concept (Monetary) For Period Credit clls:RevenueFromProductsServices
528 Total revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
529 1053 - Disclosure - Information Concerning the Group's Consolidated Operations - Additional Information (Detail) Network

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530 Consolidated operations [table] Table

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531 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
532 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
533 Calyxt Inc and Cellectis BioResearch Inc [member] Member clls:CalyxtIncAndCellectisBioResearchIncMember
534 Client A [member] Member clls:ClientAMember
535 Client B [member] Member clls:ClientBMember
536 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
537 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
538 US Subsidiaries [member] Member clls:USSubsidiariesMember
539 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
540 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
541 France [member] Member country:FR
542 United States [member] Member country:US
543 Range [axis] Axis ifrs-full:RangeAxis
544 Ranges [member] Member ifrs-full:RangesMember
545 Top of Range [member] Member ifrs-full:TopOfRangeMember
546 Geographical [Axis] Axis us-gaap:StatementGeographicalAxis
547 Geographical [Domain] Member us-gaap:SegmentGeographicalDomain
548 France [member] Member country:FR
549 Maturity [axis] Axis ifrs-full:MaturityAxis
550 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
551 Expiration Period [member] Member clls:ExpirationPeriodOneMember
552 Consolidated operations [line items] LineItems clls:ConsolidatedOperationsLineItems
553 Number of collaboration agreements Concept (Integer) For Period clls:NumberOfCollaborationAgreements
554 Revenues from technology licenses Concept (Monetary) For Period Credit ifrs-full:RevenueFromRenderingOfInformationTechnologyServices
555 Percentage of Revenue Concept (Percent) For Period ifrs-full:PercentageOfEntitysRevenue
556 Decrease (increase) in financial income and expenses Concept (Monetary) For Period Debit clls:IncreaseDecreaseInFinancialIncomeAndExpenses
557 Increase in net foreign exchange (loss) gain Concept (Monetary) For Period Credit clls:IncreaseInForeignExchangeLoss
558 Increase in interest income Concept (Monetary) For Period Credit ifrs-full:AdjustmentsForInterestIncome
559 Foreign exchange derivatives fair value adjustment Concept (Monetary) For Period Debit clls:ForeignExchangeDerivativesFairValueAdjustment
560 Tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
561 Anticipated foreign tax rate Concept (Percent) For Period clls:AnticipatedForeignTaxRate
562 Credits and net operating loss carryforwards Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfTaxLosses
563 Carryforwards limit that can be offset against future taxable profit Concept (Monetary) As Of Debit clls:CarryforwardsThatCanBeOffsetAgainstFutureTaxableProfit
564 Carryforwards limit that can be offset against future taxable profit, additional percentage of profit exceeding the limit Concept (Percent) As Of clls:CarryforwardsThatCanBeOffsetAgainstFutureTaxableProfitPercentageProfitExceedingLimit
565 Tax loss carryforward expiration period Concept (Text/String) For Period clls:TaxLossCarryForwardsExpirationPeriod
566 1054 - Disclosure - Information Concerning the Group's Consolidated Operations - Details of Operating Expenses by Nature (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureInformationConcerningTheGroupsConsolidatedOperationsDetailsOfOperatingExpensesByNature
567 Expense By Nature [Table] Table

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 clls:ExpenseByNatureTable
568 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
569 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
570 Research and Development Expenses [member] Member clls:ResearchAndDevelopmentExpensesMember
571 Selling, General and Administrative Expenses [member] Member us-gaap:SellingGeneralAndAdministrativeExpensesMember
572 Personnel Expenses [member] Member clls:PersonnelExpensesMember
573 Expense by nature [line Items] LineItems clls:ExpenseByNatureLineItems
574 Royalty expenses Concept (Monetary) For Period Debit ifrs-full:RoyaltyExpense
575 Wages and salaries Concept (Monetary) For Period Debit ifrs-full:WagesAndSalaries
576 Social charges on free shares and stock option grants Concept (Monetary) For Period Debit ifrs-full:OtherShorttermEmployeeBenefits
577 Non-cash stock based compensation expense Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
578 Personnel expenses Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
579 Purchases and external expenses Concept (Monetary) For Period Debit clls:PurchasesAndExternalExpenses
580 Other Concept (Monetary) For Period Debit ifrs-full:OtherExpenseByNature
581 Total research and development expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
582 Total selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
583 1055 - Disclosure - Information Concerning the Group's Consolidated Operations - Details of Financial Income and Expenses (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureInformationConcerningTheGroupsConsolidatedOperationsDetailsOfFinancialIncomeAndExpenses
584 Implied Table Table

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585 Finance income expense [abstract] Abstract clls:FinanceIncomeExpenseAbstract
586 Interest income Concept (Monetary) For Period Credit ifrs-full:RevenueFromInterest
587 Foreign exchange gain Concept (Monetary) For Period Credit ifrs-full:NetForeignExchangeGain
588 Other financial revenues Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncome
589 Total financial revenues Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
590 Interest expenses Concept (Monetary) For Period Debit ifrs-full:InterestExpense
591 Interest expenses for finance lease Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnFinanceLeases
592 Foreign exchange loss Concept (Monetary) For Period Debit ifrs-full:NetForeignExchangeLoss
593 Other financial expenses Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
594 Total financial expenses Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
595 Total Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
596 1056 - Disclosure - Information Concerning the Group's Consolidated Operations - Disclosure of Income Tax (Expense or Income) (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureInformationConcerningTheGroupsConsolidatedOperationsDisclosureOfIncomeTaxExpenseOrIncome
597 Implied Table Table

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 implied:Table
598 Major components of tax expense (income) [abstract] Abstract ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
599 Income (loss) before taxes from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
600 Theoretical group tax rate Concept (Percent) For Period ifrs-full:ApplicableTaxRate
601 Theoretical tax benefit (expense) Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
602 Permanent differences Concept (Monetary) For Period Credit clls:IncreaseDecreaseInTaxBenefitArisingFromPermanentDifferences
603 Research tax credit Concept (Monetary) For Period Credit clls:ResearchTaxCredit
604 Share-based compensation & other IFRS adjustments Concept (Monetary) For Period Debit clls:DecreaseIncreaseThroughTaxOnSharebasedPaymentTransactionsEquityAndOtherIfrsAdjustments
605 Non recognition of deferred tax assets related to tax losses and temporary differences Concept (Monetary) As Of ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
606 Other differences Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
607 Effective tax expense Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
608 Effective tax rate Concept (Percent) For Period ifrs-full:AverageEffectiveTaxRate
609 1057 - Disclosure - Information Concerning the Group's Consolidated Operations - Disclosure of Deferred Tax Assets and Liabilities (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureInformationConcerningTheGroupsConsolidatedOperationsDisclosureOfDeferredTaxAssetsAndLiabilities
610 Implied Table Table

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 implied:Table
611 Changes in deferred tax liability (asset) [abstract] Abstract ifrs-full:ChangesInDeferredTaxLiabilityAssetAbstract
612 Credits and net operating loss carryforwards Concept (Monetary) For Period Debit ifrs-full:TaxEffectOfTaxLosses
613 Pension commitments Concept (Monetary) As Of Debit clls:DeferredTaxAssetsPensionCommitments
614 Leases Concept (Monetary) As Of Credit clls:DeferredTaxLeasesLiabilities
615 Impairment of assets Concept (Monetary) As Of Debit clls:DeferredTaxAssetsImpairmentOfAssets
616 Revenue recognition Concept (Monetary) As Of Debit clls:DeferredTaxAssetsRevenueRecognition
617 Other Concept (Monetary) As Of Debit clls:DeferredTaxAssetsOther1
618 Valuation allowance on deferred tax assets Concept (Monetary) As Of Debit clls:ValuationAllowanceDeferredTaxAssets
619 Total Concept (Monetary) As Of Credit ifrs-full:DeferredTaxLiabilityAsset
620 1058 - Disclosure - Information Concerning the Group's Consolidated Operations - Summary of Key Performance Indicators by Reportable Segments (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureInformationConcerningTheGroupsConsolidatedOperationsSummaryOfKeyPerformanceIndicatorsByReportableSegments
621 Disclosure of operating segments [table] Table

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 ifrs-full:DisclosureOfOperatingSegmentsTable
622 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
623 Property, Plant and Equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
624 Assets Under Construction [member] Member ifrs-full:ConstructionInProgressMember
625 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
626 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
627 Operating Segments [member] Member ifrs-full:OperatingSegmentsMember
628 Inter-segment Revenues [member] Member ifrs-full:EliminationOfIntersegmentAmountsMember
629 Cellectis [member] Member clls:CellectisMember
630 Products and services [axis] Axis ifrs-full:ProductsAndServicesAxis
631 Products and services [member] Member ifrs-full:ProductsAndServicesMember
632 Plants [member] Member ifrs-full:PlantsMember
633 Therapeutics [member] Member clls:TherapeuticsMember
634 Income Statement Location1 [Axis] Axis clls:IncomeStatementLocation1Axis
635 Income Statement Location1 [Domain] Member clls:IncomeStatementLocation1Domain
636 Research and Development [member] Member clls:ResearchAndDevelopmentMember
637 Selling, General and Administration [member] Member clls:SellingGeneralAndAdministrationMember
638 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
639 External revenues Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
640 Royalty expenses Concept (Monetary) For Period Debit ifrs-full:RoyaltyExpense
641 Research and development expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
642 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
643 Other operating income and expenses Concept (Monetary) For Period Credit clls:RoyaltiesAndOtherOperatingIncomeAndExpenses
644 Total operating expenses Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
645 Operating income (loss) before tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
646 Financial gain (loss) Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
647 Income (loss) from continuing operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromContinuingOperations
648 Net income (loss) from discontinued operations Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromDiscontinuedOperations
649 Non controlling interests Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
650 Net income (loss) attributable to shareholders of Cellectis Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOwnersOfParent
651 Adjustment of share-based compensation attributable to shareholders of Cellectis Concept (Monetary) For Period Debit ifrs-full:ExpenseFromSharebasedPaymentTransactionsWithEmployees
652 Adjusted net income (loss) attributable to shareholders of Cellectis Concept (Monetary) For Period Credit clls:NetProfitLossAttributableToOwnersOfParent
653 Depreciation and amortization Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
654 Additions to tangible and intangible assets Concept (Monetary) As Of Credit ifrs-full:OtherTangibleOrIntangibleAssetsTransferred
655 Impairment of tangible assets Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
656 1059 - Disclosure - Information Concerning the Group's Consolidated Operations - Summary of Reconciliation of Plant Segment Result of Operations (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureInformationConcerningTheGroupsConsolidatedOperationsSummaryOfReconciliationOfPlantSegmentResultOfOperations
657 Disclosure of operating segments [table] Table

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 ifrs-full:DisclosureOfOperatingSegmentsTable
658 Financial effect of transition from previous GAAP to IFRSs [axis] Axis ifrs-full:FinancialEffectOfTransitionFromPreviousGAAPToIFRSsAxis
659 IFRSs [member] Member ifrs-full:IFRSsMember
660 Non Cash Stock-based Compensation Booked in IFRS [member] Member clls:NonCashStockbasedCompensationBookedInIFRSMember
661 Non Cash Stock-based Compensation in US GAAP [member] Member clls:NonCashStockbasedCompensationInUSGAAPMember
662 Calyxt Stand Alone Financial Statements (US GAAP) [member] Member clls:StandAloneFinancialStatementsUSGAAPMember
663 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
664 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
665 Cellectis Consolidated Financial Statements Reportable Segments Note (IFRS) [member] Member ifrs-full:ReportableSegmentsMember
666 Intersegment Transactions [member] Member clls:IntersegmentMember
667 Reclassifications [member] Member clls:ReclassificationsAndEliminationsMember
668 Other [member] Member clls:OtherSegmentsMember
669 Disclosure of operating segments [line items] LineItems ifrs-full:DisclosureOfOperatingSegmentsLineItems
670 External revenues and other income Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
671 Research and development expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
672 Selling, general and administrative expenses Concept (Monetary) For Period Debit ifrs-full:SellingGeneralAndAdministrativeExpense
673 Royalties and other operating income and expenses Concept (Monetary) For Period Credit ifrs-full:OtherOperatingIncomeExpense
674 Total operating expenses Concept (Monetary) For Period Debit clls:OperatingIncomeExpense
675 Operating income (loss) before tax Concept (Monetary) For Period Credit ifrs-full:ProfitLossBeforeTax
676 Financial gain (loss) Concept (Monetary) For Period Credit clls:FinancialGainLoss
677 Net income (loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
678 1060 - Disclosure - Impairment Tests - Additional Information (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureImpairmentTestsAdditionalInformation
679 Disclosure of impairment loss and reversal of impairment loss [table] Table

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*

 ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossTable
680 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
681 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
682 New Jersey [member] Member stpr:NJ
683 Continuing and discontinued operations [axis] Axis ifrs-full:ContinuingAndDiscontinuedOperationsAxis
684 Aggregate continuing and discontinued operations [member] Member ifrs-full:AggregateContinuingAndDiscontinuedOperationsMember
685 Discontinue Lease Facility [member] Member ifrs-full:DiscontinuedOperationsMember
686 Disclosure of impairment loss and reversal of impairment loss [line items] LineItems ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossLineItems
687 Impairment of assets Concept (Monetary) For Period Debit ifrs-full:ImpairmentLoss
688 1061 - Disclosure - Intangible Assets - Additional Information (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureIntangibleAssetsAdditionalInformation
689 Disclosure of detailed information about intangible assets [table] Table

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 ifrs-full:DisclosureOfIntangibleAssetsTable
690 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
691 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
692 Computer Software [member] Member ifrs-full:ComputerSoftwareMember
693 Patents [member] Member ifrs-full:CopyrightsPatentsAndOtherIndustrialPropertyRightsServiceAndOperatingRightsMember
694 Range [axis] Axis ifrs-full:RangeAxis
695 Ranges [member] Member ifrs-full:RangesMember
696 Bottom of Range [member] Member ifrs-full:BottomOfRangeMember
697 Top of Range [member] Member ifrs-full:TopOfRangeMember
698 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
699 Estimated useful lives Concept (xbrli:durationItemType) For Period clls:IntangibleAssetsOtherThanGoodwillEstimatedUsefulLife
700 1062 - Disclosure - Intangible Assets - Details Information About Intangible Assets (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureIntangibleAssetsDetailsInformationAboutIntangibleAssets
701 Disclosure of detailed information about intangible assets [table] Table

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 ifrs-full:DisclosureOfIntangibleAssetsTable
702 Classes of intangible assets and goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsAndGoodwillAxis
703 Intangible assets and goodwill [member] Member ifrs-full:IntangibleAssetsAndGoodwillMember
704 Software and Patents [member] Member clls:SoftwareAndPatentsMember
705 Assets Under Construction [member] Member ifrs-full:ConstructionInProgressMember
706 Disclosure of detailed information about intangible assets [line items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
707 Beginning balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
708 Change in scope Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughOtherChangesIntangibleAssetsAndGoodwill
709 Additions to intangible assets Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
710 Disposal of intangible assets Concept (Monetary) For Period Credit ifrs-full:DisposalsIntangibleAssetsAndGoodwill
711 Depreciation expense Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
712 Translation adjustments Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesIntangibleAssetsAndGoodwill
713 Ending balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsAndGoodwill
714 Gross value at end of period Concept (Monetary) As Of Debit clls:IntangibleAssetsAndGoodwillGross
715 Accumulated depreciation and impairment at end of period Concept (Monetary) As Of Credit clls:IntangibleAssetsAndGoodwillAccumulatedDepreciationAndImpairment
716 1063 - Disclosure - Property, Plant and Equipment - Summary of Property Plant and Equipment Estimated Useful Lives (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentSummaryOfPropertyPlantAndEquipmentEstimatedUsefulLives
717 Disclosure of detailed information about property, plant and equipment [table] Table

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 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
718 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
719 Property, Plant and Equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
720 Buildings and Other Outside Improvements [member] Member clls:BuildingsAndOtherOutsideImprovementsMember
721 Leasehold Improvements [member] Member ifrs-full:LeaseholdImprovementsMember
722 Office Furniture [member] Member clls:FurnitureFixturesAndOfficeEquipmentMember
723 Laboratory Equipment [member] Member clls:LaboratoryEquipmentMember
724 Office Equipment [member] Member ifrs-full:OfficeEquipmentMember
725 IT Equipment [member] Member ifrs-full:ComputerEquipmentMember
726 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
727 Estimated useful lives Concept (Text/String) For Period ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
728 1064 - Disclosure - Property, Plant and Equipment - Disclosure of Property, Plant and Equipment (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentDisclosureOfPropertyPlantAndEquipment
729 Disclosure of detailed information about property, plant and equipment [table] Table

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 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
730 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
731 Property, Plant and Equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
732 Land and Buildings [member] Member ifrs-full:LandAndBuildingsMember
733 Technical Equipment [member] Member clls:TechnicalEquipmentMember
734 Fixtures, Fittings and Other Equipment [member] Member ifrs-full:FixturesAndFittingsMember
735 Assets Under Construction [member] Member ifrs-full:ConstructionInProgressMember
736 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
737 Beginning balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
738 Additions to tangible assets Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
739 Disposal of tangible assets Concept (Monetary) For Period Debit ifrs-full:ChangesInPropertyPlantAndEquipment
740 Reclassification Concept (Monetary) For Period Credit clls:ReclassificationAdjustmentsOfPropertyPlantAndEquipment
741 Depreciation expense Concept (Monetary) For Period ifrs-full:DepreciationPropertyPlantAndEquipment
742 Translation adjustments Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughNetExchangeDifferencesPropertyPlantAndEquipment
743 Ending balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
744 Gross value at end of period Concept (Monetary) As Of Debit clls:PropertyPlantAndEquipmentsGross
745 Accumulated depreciation and impairment at end of period Concept (Monetary) As Of Credit clls:PropertyPlantAndEquipmentAccumulatedDepreciationAmortisationAndImpairment
746 1065 - Disclosure - Property, Plant and Equipment - Additional Information (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosurePropertyPlantAndEquipmentAdditionalInformation
747 Disclosure of detailed information about property, plant and equipment [table] Table

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 ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
748 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
749 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
750 Calyxt Inc. [member] Member clls:CalyxtMember
751 Cellectis [member] Member clls:CellectisMember
752 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
753 Property, Plant and Equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
754 Raw material manufacturing facility [member] Member clls:RawMaterialManufacturingFacilityMember
755 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
756 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
757 Paris [member] Member clls:ParisMember
758 United States [member] Member country:US
759 Disclosure of detailed information about property, plant and equipment [line items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
760 Assets pledged as security for financial liabilities Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsPledgedAsCollateralForLiabilitiesOrContingentLiabilities
761 Net book value of assets sold Concept (Monetary) For Period Debit ifrs-full:AssetsOtherThanCashOrCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013
762 Additions to tangible assets Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
763 Other equipment Concept (Monetary) As Of Debit ifrs-full:OtherPropertyPlantAndEquipment
764 1066 - Disclosure - Property, Plant and Equipment - Details of Finance Lease (Detail) Network

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765 Disclosure of recognised finance lease as assets by lessee [table] Table

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 ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeTable
766 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
767 Carrying amount [member] Member ifrs-full:CarryingAmountMember
768 Gross Value [member] Member ifrs-full:GrossCarryingAmountMember
769 Accumulated Depreciation [member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
770 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
771 Assets [member] Member ifrs-full:ClassesOfAssetsMember
772 Property, Plant and Equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
773 Disclosure of recognised finance lease as assets by lessee [line items] LineItems ifrs-full:DisclosureOfRecognisedFinanceLeaseAsAssetsByLesseeLineItems
774 Net Concept (Monetary) As Of Debit ifrs-full:RecognisedFinanceLeaseAsAssets
775 1067 - Disclosure - Financial Assets and Liabilities - Summary of Financial Assets and Liabilities (Detail) Network

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776 Disclosure Of Financial Assets And Liabilities [Table] Table

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 clls:DisclosureOfFinancialAssetsAndLiabilitiesTable
777 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
778 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
779 Non-Current Financial Liabilities [member] Member clls:NonCurrentFinancialLiabilitiesMember
780 Current Financial Liabilities [member] Member clls:CurrentFinancialLiabilitiesMember
781 Trade Payables [member] Member clls:TradePayablesMember
782 Other Current Liabilities1 [member] Member clls:OtherCurrentLiabilities1Member
783 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
784 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
785 Non-Current Financial Assets [member] Member clls:NonCurrentFinancialAssetsMember
786 Trade Receivables [member] Member ifrs-full:TradeReceivablesMember
787 Subsidies Receivables [member] Member clls:SubsidiesReceivablesMember
788 Current Financial Assets [member] Member clls:CurrentFinancialAssetsMember
789 Cash and Cash Equivalents [member] Member clls:CashAndCashEquivalentMember
790 Disclosure of financial assets and liabilities [line items] LineItems clls:DisclosureOfFinancialAssetsAndLiabilitiesLineItems
791 Accounting category fair value through profit and loss Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLoss
792 Accounting category amortized cost Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtAmortisedCost
793 Book value on the statement of financial position Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
794 Fair value Concept (Monetary) As Of Debit ifrs-full:FinancialAssetsAtFairValue
795 Accounting category fair value through profit and loss Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLoss
796 Accounting category amortized cost Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtAmortisedCost
797 Book value on the statement of financial position Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
798 Fair value Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
799 1068 - Disclosure - Financial Assets and Liabilities - Additional Information (Detail) Network

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800 Disclosure Of Financial Assets And Liabilities [Table] Table

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801 Currency 1 [Axis] Axis clls:Currency1Axis
802 Currency 1 [Domain] Member clls:Currency1Domain
803 US Dollar [member] Member clls:USDollarMember
804 Classes of financial assets [axis] Axis ifrs-full:ClassesOfFinancialAssetsAxis
805 Financial assets, class [member] Member ifrs-full:FinancialAssetsMember
806 Cash Cash and Cash Equivalents and Current Assets [member] Member clls:CashCashAndCashEquivalentsAndCurrentAssetsMember
807 Current Financial Assets and Cash and Cash Equivalents [member] Member clls:CurrentFinancialAssetsAndCashAndCashEquivalentsMember
808 Disclosure of financial assets and liabilities [line items] LineItems clls:DisclosureOfFinancialAssetsAndLiabilitiesLineItems
809 Currency denominated percentage Concept (Percent) For Period clls:FunctionalCurrencyPercentage
810 Derivative financial assets Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssets
811 Finance lease liabilities Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
812 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
813 1069 - Disclosure - Financial Assets and Liabilities - Summary of Derivative Financial Instruments (Detail) Network

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814 Disclosure of financial assets [table] Table

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815 Financial instruments measured at fair value through profit or loss because credit derivative is used to manage credit risk [axis] Axis ifrs-full:FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskAxis
816 Financial instruments measured at fair value through profit or loss because credit derivative is used to manage credit risk [member] Member ifrs-full:FinancialInstrumentsMeasuredAtFairValueThroughProfitOrLossBecauseCreditDerivativeIsUsedToManageCreditRiskMember
817 USD Forward Sale Contracts [member] Member clls:ForwardSaleContractsMember
818 USD Forward Purchase Contracts [member] Member clls:ForwardPurchaseContractsMember
819 Disclosure of financial assets [line items] LineItems ifrs-full:DisclosureOfFinancialAssetsLineItems
820 Notional Concept (Monetary) As Of invest:DerivativeNotionalAmount
821 Fair Value Concept (Monetary) As Of Debit ifrs-full:CreditDerivativeFairValue
822 Maturity Concept (Text/String) For Period clls:DerivativeMaturityDescription
823 Derivative financial assets Concept (Monetary) As Of Debit ifrs-full:DerivativeFinancialAssets
824 Derivative financial liabilities Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
825 1070 - Disclosure - Inventories - Additional Information (Detail) Network

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826 Disclosure of inventories [table] Table

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827 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
828 Property, Plant and Equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
829 Laboratory Equipment [member] Member clls:LaboratoryEquipmentMember
830 Disclosure of inventories [line items] LineItems clls:DisclosureOfInventoriesLineItems
831 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
832 Provision for impairment Concept (Monetary) For Period Credit clls:InventoriesImpairmentProvision
833 1071 - Disclosure - Trade Receivables and Other Current Assets - Disclosure of Trade Receivables (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureTradeReceivablesAndOtherCurrentAssetsDisclosureOfTradeReceivables
834 Implied Table Table

*

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835 Trade and other receivables [abstract] Abstract ifrs-full:TradeAndOtherReceivablesAbstract
836 Trade receivables Concept (Monetary) As Of Debit ifrs-full:TradeReceivables
837 Provision for expected credit losses Concept (Monetary) As Of Credit clls:ProvisionForExpectedCreditLosses
838 Total net value of trade receivables Concept (Monetary) As Of Debit ifrs-full:CurrentTradeReceivables
839 1072 - Disclosure - Trade Receivables and Other Current Assets - Disclosure of Subsidies Receivables (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureTradeReceivablesAndOtherCurrentAssetsDisclosureOfSubsidiesReceivables
840 Implied Table Table

*

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841 Receivables1 [abstract] Abstract clls:Receivables1Abstract
842 Research tax credit Concept (Monetary) As Of Debit clls:ResearchTaxCreditReceivable
843 Other subsidies Concept (Monetary) As Of Debit clls:OtherReceivableSubsidies
844 Valuation allowance for other subsidies Concept (Monetary) As Of Credit clls:ValuationAllowanceForOtherSubsidies
845 Total subsidies receivables Concept (Monetary) As Of Debit clls:TotalReceivables
846 1073 - Disclosure - Trade Receivables and Other Current Assets - Additional Information (Detail) Network

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847 Prepaid Expenses and Other Current Assets [Table] Table

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848 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
849 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
850 France [member] Member country:FR
851 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
852 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
853 Calyxt Inc. [member] Member clls:CalyxtMember
854 Prepaid expenses and other current assets [line items] LineItems clls:PrepaidExpensesAndOtherCurrentAssetsLineItems
855 Research tax credit receivables Concept (Monetary) As Of Debit clls:ResearchTaxCreditReceivable
856 Deferred expense on sale and lease-back transaction Concept (Monetary) As Of Debit clls:DeferredLossFromSaleAndLeasebackTransactionsCurrent
857 Other current assets Concept (Monetary) As Of Debit clls:DeferredExpensesAndOtherCurrentAssets
858 Tax receivables Concept (Monetary) As Of Debit clls:CurrentTaxesReceivable
859 Social charges on personnel expenses Concept (Monetary) For Period Debit clls:SocialChargesOnPersonnelExpenses
860 Other deferred expenses Concept (Monetary) For Period Debit clls:OtherDeferredExpenses
861 1074 - Disclosure - Trade Receivables and Other Current Assets - Disclosure of Other Current Assets (Detail) Network

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*

 http://www.cellectis.com/taxonomy/role/DisclosureTradeReceivablesAndOtherCurrentAssetsDisclosureOfOtherCurrentAssets
862 Implied Table Table

*

*

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863 Other Current Assets [abstract] Abstract clls:OtherCurrentAssetsAbstract
864 VAT receivables Concept (Monetary) As Of Debit ifrs-full:CurrentValueAddedTaxReceivables
865 Prepaid expenses and other prepayments Concept (Monetary) As Of Debit ifrs-full:CurrentPrepaidExpenses
866 Tax and social receivables Concept (Monetary) As Of Debit clls:TaxAndSocialReceivablesCurrent
867 Deferred expenses and other current assets Concept (Monetary) As Of Debit clls:DeferredExpensesAndOtherCurrentAssets
868 Total other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
869 1075 - Disclosure - Current Financial Assets and Cash and Cash Equivalents - Summary of Current Financial Assets and Cash and Cash Equivalents (Detail) Network

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*

 http://www.cellectis.com/taxonomy/role/DisclosureCurrentFinancialAssetsAndCashAndCashEquivalentsSummaryOfCurrentFinancialAssetsAndCashAndCashEquivalents
870 Disclosure of Current Financial Assets and Cash and Cash Equivalents [Table] Table

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*

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871 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
872 Carrying amount [member] Member ifrs-full:CarryingAmountMember
873 Carrying Value [member] Member clls:CarryingAmountAndValueMember
874 Estimated Fair Value [member] Member clls:EstimatedFairValueMember
875 Disclosure of current financial assets and cash and cash equivalents [line items] LineItems clls:DisclosureOfCurrentFinancialAssetsAndCashAndCashEquivalentsLineItems
876 Current financial assets Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssets
877 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
878 Current financial assets and cash and cash equivalents Concept (Monetary) As Of Debit clls:CurrentFinancialAssetsAndCashAndCashEquivalents
879 1076 - Disclosure - Current Financial Assets and Cash and Cash Equivalents - Additional Information (Detail) Network

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*

 http://www.cellectis.com/taxonomy/role/DisclosureCurrentFinancialAssetsAndCashAndCashEquivalentsAdditionalInformation
880 Disclosure of Current Financial Assets and Cash and Cash Equivalents [Table] Table

*

*

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881 Classes of assets [axis] Axis ifrs-full:ClassesOfAssetsAxis
882 Assets [member] Member ifrs-full:ClassesOfAssetsMember
883 Broker license [member] Member clls:BrokerLicenseMember
884 Furniture and equipment sales lease back [member] Member clls:FurnitureAndEquipmentSalesLeaseBackMember
885 Valuation techniques used in fair value measurement [axis] Axis ifrs-full:ValuationTechniquesUsedInFairValueMeasurementAxis
886 Valuation Techniques [Member] Member ifrs-full:ValuationTechniquesMember
887 Valuation inputs [member] Member clls:FairValueValuationTechniqueMember
888 Disclosure of current financial assets and cash and cash equivalents [line items] LineItems clls:DisclosureOfCurrentFinancialAssetsAndCashAndCashEquivalentsLineItems
889 Restricted cash Concept (Monetary) As Of Debit ifrs-full:RestrictedCashAndCashEquivalents
890 Short term restricted cash Concept (Monetary) As Of Debit ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
891 Nominal value amount Concept (Monetary) As Of ifrs-full:NotionalAmount
892 Fair value amount Concept (Monetary) As Of Debit ifrs-full:CurrentFinancialAssetsAtFairValueThroughProfitOrLoss
893 Other current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentFinancialAssets
894 1077 - Disclosure - Current Financial Assets and Cash and Cash Equivalents - Summary of Cash and Cash Equivalents (Detail) Network

*

*

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895 Implied Table Table

*

*

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896 Cash and cash equivalents [abstract] Abstract ifrs-full:CashAndCashEquivalentsAbstract
897 Cash and bank accounts Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
898 Money market funds Concept (Monetary) As Of Debit clls:MoneyMarketAccounts
899 Fixed bank deposits Concept (Monetary) As Of Debit ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
900 Total cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
901 1078 - Disclosure - Financial Liabilities - Schedule of Financial Liabilities (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureFinancialLiabilitiesScheduleOfFinancialLiabilities
902 Implied Table Table

*

*

 implied:Table
903 Categories of financial liabilities [abstract] Abstract ifrs-full:CategoriesOfFinancialLiabilitiesAbstract
904 Finance leases Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinanceLeaseLiabilities
905 Total non-current financial liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
906 Finance leases Concept (Monetary) As Of Credit ifrs-full:CurrentFinanceLeaseLiabilities
907 Total current financial liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
908 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesToTradeSuppliers
909 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
910 Total Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
911 1079 - Disclosure - Financial Liabilities - Schedule Representing Due Dates of the Financial Liabilities (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureFinancialLiabilitiesScheduleRepresentingDueDatesOfTheFinancialLiabilities
912 Disclosure of offsetting of financial liabilities [table] Table

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*

 ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesTable
913 Maturity [axis] Axis ifrs-full:MaturityAxis
914 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
915 Less than One Year [member] Member ifrs-full:NotLaterThanOneYearMember
916 One to Five Years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
917 More than Five Years [member] Member ifrs-full:LaterThanFiveYearsMember
918 Disclosure of offsetting of financial liabilities [line items] LineItems ifrs-full:DisclosureOfOffsettingOfFinancialLiabilitiesLineItems
919 Finance leases Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
920 Derivative instruments Concept (Monetary) As Of Credit ifrs-full:DerivativeFinancialLiabilities
921 Financial liabilities Concept (Monetary) As Of Credit clls:FinancialLiabilitiesExcludingTradesPayableAndOtherCurrentLiabilities
922 Trade payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayablesToTradeSuppliers
923 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentFinancialLiabilities
924 Total Financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilitiesAtFairValue
925 1080 - Disclosure - Other Current Liabilities - Summary of Other Current Liabilities (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureOtherCurrentLiabilitiesSummaryOfOtherCurrentLiabilities
926 Implied Table Table

*

*

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927 Miscellaneous current liabilities [abstract] Abstract ifrs-full:MiscellaneousCurrentLiabilitiesAbstract
928 VAT Payables Concept (Monetary) As Of Credit ifrs-full:CurrentValueAddedTaxPayables
929 Accruals for personnel related expenses Concept (Monetary) As Of Credit ifrs-full:CurrentAccruedExpensesAndOtherCurrentLiabilities
930 Other Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
931 Total Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
932 1081 - Disclosure - Other Current Liabilities - Additional Information (Detail) Network

*

*

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933 Implied Table Table

*

*

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934 Other current liabilities [abstract] Abstract clls:OtherCurrentLiabilitiesAbstract
935 Board of directors attendance fee Concept (Monetary) For Period Credit clls:AttendanceFee
936 Reimbursement of excess subsidy Concept (Monetary) For Period Credit clls:ReimbursementOfExcessSubsidyReceived
937 1082 - Disclosure - Deferred Revenues and Contract Liabilities - Summary of Deferred Revenues and Contract Liabilities (Detail) Network

*

*

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938 Implied Table Table

*

*

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939 Accruals and deferred income [abstract] Abstract ifrs-full:AccrualsAndDeferredIncomeAbstract
940 Deferred revenues and contract liabilities Concept (Monetary) As Of Credit clls:DeferredRevenuesAndContractLiabilitiesGross
941 Other Concept (Monetary) As Of Credit clls:TaxIncrementFinancing
942 Total Deferred revenue and contract liabilities Concept (Monetary) As Of Credit clls:DeferredRevenuesAndContractLiabilities
943 1083 - Disclosure - Capital - Schedule of Classes of Share Capital (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureCapitalScheduleOfClassesOfShareCapital
944 Disclosure of classes of share capital [table] Table

*

*

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945 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
946 Income (Loss) [member] Member ifrs-full:EquityMember
947 Reserve of Share-based Payments [member] Member ifrs-full:ReserveOfSharebasedPaymentsMember
948 Premiums Related to Share Capital [member] Member ifrs-full:SharePremiumMember
949 Share Capital Ordinary Shares [member] Member ifrs-full:OrdinarySharesMember
950 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
951 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
952 BSA, BSPCE and Free Shares [member] Member clls:BsaBspcsAndFreeShareMember
953 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
954 Capital increase by issuance of common shares Concept (Monetary) For Period Credit clls:IncreaseDecreaseInIssuedCapital
955 Beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
956 Balance at beginning of year Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
957 Capital Increase Concept (Monetary) For Period clls:IncreaseDecreaseInCapital
958 Exercise of share warrants, employee warrants and stock options Concept (Monetary) For Period Credit clls:IncreaseDecreaseThroughExerciseOfOptionsAndWarrants
959 Non-cash stock based compensation expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
960 Balance at end of year Concept (Monetary) As Of Credit ifrs-full:SharePremium
961 Capital increase by issuance of common shares Concept (Shares) For Period ifrs-full:IncreaseDecreaseInNumberOfOrdinarySharesIssued
962 Exercise of share warrants, employee warrants and stock options Concept (Shares) As Of clls:NumberOfOutstandingShareOptionsAndWarrants
963 Other movements Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesEquity
964 Balance at end of year Concept (Monetary) As Of Credit ifrs-full:Equity
965 Balance at end of year Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
966 Nominal value Concept (Share) As Of ifrs-full:ParValuePerShare
967 Nominal value Concept (Share) As Of ifrs-full:ParValuePerShare
968 Balance at beginning of year Concept (Monetary) As Of Credit ifrs-full:SharePremium
969 1084 - Disclosure - Capital - Additional Information (Detail) Network

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*

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970 Capital structure [table] Table

*

*

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971 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
972 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
973 BSPCE [member] Member clls:BspceMember
974 Free Shares [member] Member clls:FreeSharesMember
975 BSA [member] Member clls:BSAMember
976 Capital requirements [axis] Axis ifrs-full:CapitalRequirementsAxis
977 Capital requirements [member] Member ifrs-full:CapitalRequirementsMember
978 Capital revolution 2017 [member] Member clls:CapitalRevolution2017Member
979 Capital revolution 2016 [member] Member clls:CapitalRevolution2016Member
980 Capital revolution 2018 [member] Member clls:CapitalRevolution2018Member
981 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
982 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
983 BSA [member] Member clls:BSAMember
984 Calyxt Inc. [member] Member clls:CalyxtMember
985 Natixis [member] Member clls:NatixisSecuritiesMember
986 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
987 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
988 Cellectis [member] Member clls:CellectisMember
989 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
990 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
991 Calyxt Inc [member] Member clls:CalyxtIncMember
992 Maturity [axis] Axis ifrs-full:MaturityAxis
993 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
994 Hold Two Years [member] Member clls:HoldTwoYearsMember
995 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
996 Income (Loss) [member] Member ifrs-full:EquityMember
997 Treasury Shares [member] Member ifrs-full:TreasurySharesMember
998 Capital structure [line items] LineItems clls:CapitalStructureLineItems
999 Ordinary shares issued Concept (Shares) As Of ifrs-full:NumberOfSharesIssued
1000 Number of employee warrants exercisable Concept (Shares) For Period clls:NumberOfEmployeeWarrantsExercisable
1001 Options exercise Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1002 Exercise stock option Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfOrdinaryShares
1003 Number of non-employee warrants subscribed Concept (Shares) For Period clls:SubscriptionOfNonEmployeesWarrants
1004 Underwriting discounts and commissions Concept (Monetary) For Period Debit clls:UnderwritingDiscountsAndCommissions
1005 Number of shares converted Concept (Shares) For Period clls:NumberOfSharesConverted
1006 Voting right description Concept (Text/String) For Period clls:DescriptionOfVotingRight
1007 Number of shares ordinary outstanding Concept (Shares) As Of ifrs-full:NumberOfSharesOutstanding
1008 Number of shares ordinary having double voting right Concept (Shares) For Period clls:NumberOfSharesWithDoubleVotingRights
1009 Equity interests Concept (Percent) As Of ifrs-full:PercentageOfVotingEquityInterestsAcquired
1010 Compensation expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
1011 Par value per share Concept (Share) As Of ifrs-full:ParValuePerShare
1012 Shares to underwriters Concept (Monetary) As Of Credit clls:CommonStockIssuedToUnderwriters
1013 Non-controlling shareholders interest Concept (Percent) For Period ifrs-full:ProportionOfOwnershipInterestsHeldByNoncontrollingInterests
1014 Offering expense Concept (Monetary) For Period Debit clls:OfferingExpense
1015 Purchase of common stock Concept (Shares) For Period clls:NumberOfOrdinarySharesRepurchased
1016 Purchase of common stock, value Concept (Monetary) For Period Debit clls:ValueOfOrdinarySharesRepurchased
1017 Initial advance payment on liquidity contract Concept (Monetary) For Period Debit clls:InitialAdvancePaymentOnLiquidityContract
1018 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
1019 1085 - Disclosure - Capital - Disclosure of Share Warrants and Non-employee Warrants (Detail) Network

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*

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1020 Disclosure of terms and conditions of share-based payment arrangement [table] Table

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1021 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1022 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1023 BSPCE D [member] Member clls:BSPCEDMember
1024 BSPCE E [member] Member clls:BSPCEEMember
1025 Free Shares [member] Member clls:FreeSharesMember
1026 BSA [member] Member clls:BSAMember
1027 Stock options [member] Member clls:StockOption1Member
1028 Maturity [axis] Axis ifrs-full:MaturityAxis
1029 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1030 2/28/2008 [member] Member clls:FebruaryTwentyEightTwoThousandEightMember
1031 7/27/2010 [member] Member clls:JulyTwentySevenThousandTenMember
1032 3/24/2015 [member] Member clls:MarchTwentyFourTwoThousandFifteenMember
1033 3/27/2015 [member] Member clls:MarchTwentySevenTwoThousandFifteenMember
1034 5/18/2015 [member] Member clls:MayEighteenTwoThousandFifteenMember
1035 9/8/2015 [member] Member clls:SeptemberEightTwoThousandFifteenMember
1036 3/14/2016 [member] Member clls:MarchFourteenTwoThousandSixteenMember
1037 10/28/2016 [member] Member clls:OctoberTwentyEightTwoThousandSixteenMember
1038 10/11/2017 [member] Member clls:OctoberElevenTwoThousandSeventeenMember
1039 10/08/2018 [member] Member clls:OctoberEightTwoThousandEighteenMember
1040 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1041 Date Concept (Text/String) For Period ifrs-full:DateOfGrantOfSharebasedPaymentArrangement
1042 Type Concept (Text/String) For Period ifrs-full:DescriptionOfMethodOfSettlementForSharebasedPaymentArrangement
1043 Number of options/warrants/ shares outstanding Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1044 Number of options/warrants/ shares granted Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
1045 Number of options/warrants/ shares vested/exercised Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExercisedOrVestedInSharebasedPaymentArrangement
1046 Number of options/warrants/ shares voided Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsExpiredInSharebasedPaymentArrangement
1047 Number of options/warrants/ shares outstanding Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
1048 Maximum of shares to be issued Concept (Shares) For Period clls:NumberOfShareOptionsIssuedInShareBasedPaymentArrangement
1049 Number of options/warrants/ shares exercisable Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsExercisableInSharebasedPaymentArrangement
1050 1086 - Disclosure - Capital - Schedule of Information Relating to Subsidiaries that Reported Non-Controlling Interest (Detail) Network

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1051 Disclosure of analysis of other comprehensive income by item [table] Table

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*

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1052 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1053 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1054 Calyxt Inc. [member] Member clls:CalyxtMember
1055 Disclosure of analysis of other comprehensive income by item [line items] LineItems ifrs-full:DisclosureOfAnalysisOfOtherComprehensiveIncomeByItemLineItems
1056 Revenue Concept (Monetary) For Period Credit ifrs-full:Revenue
1057 Net Profit (Loss) Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
1058 Net Profit (Loss) attributable to NCI Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToNoncontrollingInterests
1059 Other comprehensive income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
1060 Total comprehensive income Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
1061 Total comprehensive income attributable to NCI Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncomeAttributableToOwnersOfParent
1062 Current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
1063 Non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
1064 Current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
1065 Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
1066 Net assets Concept (Monetary) As Of Debit ifrs-full:NetAssetsLiabilities
1067 Net assets attributable to NCI Concept (Monetary) As Of Debit clls:NetAssetsAttributableToNonControllingInterest
1068 1087 - Disclosure - Share-based Payments - Additional Information (Detail) Network

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*

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1069 Disclosure of terms and conditions of share-based payment arrangement [table] Table

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1070 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1071 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1072 Stock options [member] Member clls:StockOption1Member
1073 Warrants [member] Member clls:WarrantsMember
1074 S A free shares [member] Member clls:SAFreeSharesMember
1075 RSU Calyxt 2017 [member] Member clls:RestrictedStockUnitMember
1076 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1077 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1078 Stock options [member] Member clls:StockOption1Member
1079 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1080 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1081 Calyxt Inc. [member] Member clls:CalyxtMember
1082 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1083 Expected dividend yield Concept (Percent) For Period ifrs-full:ExpectedDividendAsPercentageShareOptionsGranted
1084 Vesting period, years Concept (xbrli:durationItemType) For Period clls:OptionVestingPeriod
1085 Stock option expire, years Concept (xbrli:durationItemType) For Period clls:ExpirationPeriodOfStockOptionPlan
1086 Share-based compensation expense Concept (Monetary) For Period Debit ifrs-full:EmployeeBenefitsExpense
1087 Vesting description Concept (Text/String) For Period ifrs-full:DescriptionOfVestingRequirementsForSharebasedPaymentArrangement
1088 Dividend yield Concept (Percent) For Period clls:DividendYield
1089 Expected dividend yield type description Concept (Text/String) For Period clls:DividendYieldTypeDescription
1090 Vesting period of warrants Concept (Text/String) For Period clls:VestingPeriodOfWarrants
1091 1088 - Disclosure - Share-based Payments - Summary of Vesting Details (Detail) Network

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*

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1092 Disclosure of terms and conditions of share-based payment arrangement [table] Table

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1093 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1094 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1095 Equity awards [member] Member clls:EquityAwardsMember
1096 Range [axis] Axis ifrs-full:RangeAxis
1097 Ranges [member] Member ifrs-full:RangesMember
1098 Bottom of Range [member] Member ifrs-full:BottomOfRangeMember
1099 Top of Range [member] Member ifrs-full:TopOfRangeMember
1100 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1101 Weighted-Average fair values of stock options granted Concept (Share) For Period clls:WeightedAverageSharePriceShareOptionsGrantedPerShare
1102 Risk-free interest rate Concept (Percent) For Period ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
1103 Share entitlement per options Concept (Share) For Period clls:ExercisePriceShareEntitlementPerOptionsPerShare
1104 Exercise price Concept (Share) For Period clls:ExercisePricePerShareOptionsGranted
1105 Grant date share fair value Concept (Share) For Period clls:WeightedAverageFairValueAtMeasurementDateShareOptionsGrantedPerShare
1106 Expected volatility Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
1107 Expected term (in years) Concept (xbrli:durationItemType) For Period clls:DescriptionOfExpectedTermsOfYearsShareOptionsGranted
1108 Vesting conditions Concept (Text/String) For Period clls:DescriptionOfVestingConditionsForSharebasedPaymentArrangement
1109 Vesting period Concept (Text/String) For Period ifrs-full:DescriptionOfVestingRequirementsForSharebasedPaymentArrangement
1110 1089 - Disclosure - Share-Based Payments - Summary of Information on Stock Option Activity (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureShareBasedPaymentsSummaryOfInformationOnStockOptionActivity
1111 Disclosure Of Number And Weighted Average Exercise Prices Of Share Options and Awards [Table] Table

*

*

 clls:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsAndAwardsTable
1112 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1113 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1114 Stock options [member] Member clls:StockOption1Member
1115 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1116 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1117 Calyxt Inc. [member] Member clls:CalyxtMember
1118 Disclosure Of Number And Weighted Average Exercise Prices Of Share Options and awards [Line Items] LineItems clls:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsAndAwardsLineItems
1119 Option exercisable, beginning balance Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1120 Option exercisable, granted Concept (Decimal) For Period clls:NumberOfOptionsExercisableGrantedInSharebasedPaymentArrangement
1121 Option exercisable, exercised Concept (Decimal) For Period clls:NumberOfOptionsExercisableExercisedInSharebasedPaymentArrangement
1122 Option exercisable, forfeited or expired Concept (Decimal) For Period clls:NumberOfOptionsExercisableForfeitedOrExpiredInSharebasedPaymentArrangement
1123 Option exercisable, ending balance Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1124 Weighted- average exercise price per share, beginning balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1125 Weighted- average exercise price per share, granted Concept (Monetary) For Period clls:WeightedAverageExercisePriceOfShareOptionsExercisableGrantedInSharebasedPaymentArrangement
1126 Weighted- average exercise price per share, exercised Concept (Monetary) For Period clls:WeightedAverageExercisePriceOfShareOptionsExercisableExercisedInSharebasedPaymentArrangement
1127 Weighted- average exercise price per share, forfeited or expired Concept (Monetary) For Period clls:WeightedAverageExercisePriceOfShareOptionsExercisableForfeitedOrExpiredInSharebasedPaymentArrangement
1128 Weighted- average exercise price per share, ending balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1129 Option outstanding, beginning balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1130 Option outstanding, granted Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1131 Option outstanding, exercised Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1132 Option outstanding, forfeited or expired Concept (Decimal) For Period clls:NumberOfShareOptionsForfeitedOrExpiredInSharebasedPaymentArrangement
1133 Option outstanding, ending balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1134 Weighted average exercise price per share, beginning balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1135 Remaining Average Useful Life Concept (xbrli:durationItemType) For Period clls:WeightedAverageRemainingContractualLifeOfOutstandingShareOptionsPeriod
1136 Weighted average exercise price per share, granted Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
1137 Weighted average exercise price per share, exercised Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
1138 Weighted average exercise price per share, forfeited or expired Concept (Monetary) For Period clls:WeightedAverageExercisePriceOfShareOptionsForfeitedOrExpiredInSharebasedPaymentArrangement
1139 Weighted average exercise price per share, ending balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1140 1090 - Disclosure - Share-Based Payments - Summary of Weighted-average Fair Values of Warrants Granted and Assumptions Used for Black-Scholes Option Pricing Model (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureShareBasedPaymentsSummaryOfWeightedaverageFairValuesOfWarrantsGrantedAndAssumptionsUsedForBlackScholesOptionPricingModel
1141 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1142 Range [axis] Axis ifrs-full:RangeAxis
1143 Ranges [member] Member ifrs-full:RangesMember
1144 Bottom of Range [member] Member ifrs-full:BottomOfRangeMember
1145 Top of Range [member] Member ifrs-full:TopOfRangeMember
1146 Classes of share capital [axis] Axis ifrs-full:ClassesOfShareCapitalAxis
1147 Share capital [member] Member ifrs-full:ClassesOfShareCapitalMember
1148 Warrants [member] Member clls:Warrant1Member
1149 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1150 Weighted-Average fair values of warrants granted Concept (Share) For Period clls:WeightedAverageSharePriceShareOptionsGrantedPerShare
1151 Risk-free interest rate Concept (Percent) For Period clls:RiskFreeInterestRateOfWarrants
1152 Share entitlement per options Concept (Share) For Period clls:ExercisePriceShareEntitlementPerOptionsPerShare
1153 Exercise price Concept (Share) For Period clls:ExercisePricePerShareOptionsGranted
1154 Grant date share fair value Concept (Share) For Period clls:WeightedAverageFairValueAtMeasurementDateShareOptionsGrantedPerShare
1155 Expected volatility Concept (Percent) For Period clls:ExpectedVolatilityNonOptionsGranted
1156 Expected term (in years) Concept (xbrli:durationItemType) For Period clls:ExpectedTermsOfYears
1157 Vesting conditions Concept (Text/String) For Period clls:DescriptionOfVestingConditionsForSharebasedPaymentArrangement
1158 Vesting period Concept (Text/String) For Period clls:DescriptionOfShareBasedPaymentArrangementVestingPeriod
1159 1091 - Disclosure - Share-Based Payments - Summary of Information on Warrants Activity (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureShareBasedPaymentsSummaryOfInformationOnWarrantsActivity
1160 Disclosure Of Number And Weighted Average Exercise Prices Of Share Options and Awards [Table] Table

*

*

 clls:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsAndAwardsTable
1161 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1162 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1163 Warrants [member] Member clls:WarrantsMember
1164 Disclosure Of Number And Weighted Average Exercise Prices Of Share Options and awards [Line Items] LineItems clls:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsAndAwardsLineItems
1165 Option exercisable, beginning balance Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1166 Warrants exercisable, granted Concept (Decimal) For Period clls:NumberOfOptionsExercisableGrantedInSharebasedPaymentArrangement
1167 Warrants exercisable, exercised Concept (Decimal) For Period clls:NumberOfOptionsExercisableExercisedInSharebasedPaymentArrangement
1168 Warrants exercisable, forfeited or expired Concept (Decimal) For Period clls:NumberOfOptionsExercisableForfeitedOrExpiredInSharebasedPaymentArrangement
1169 Option exercisable, ending balance Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
1170 Weighted- average exercise price per share, beginning balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1171 Weighted- average exercise price per share, granted Concept (Monetary) For Period clls:WeightedAverageExercisePriceOfShareOptionsExercisableGrantedInSharebasedPaymentArrangement
1172 Weighted- average exercise price per share, exercised Concept (Monetary) For Period clls:WeightedAverageExercisePriceOfShareOptionsExercisableExercisedInSharebasedPaymentArrangement
1173 Weighted- average exercise price per share, forfeited or expired Concept (Monetary) For Period clls:WeightedAverageExercisePriceOfShareOptionsExercisableForfeitedOrExpiredInSharebasedPaymentArrangement
1174 Weighted- average exercise price per share, ending balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
1175 Option outstanding, beginning balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1176 Warrants outstanding, granted Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
1177 Warrants outstanding, exercised Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
1178 Warrants outstanding, forfeited or expired Concept (Decimal) For Period clls:NumberOfShareOptionsForfeitedOrExpiredInSharebasedPaymentArrangement
1179 Option outstanding, ending balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
1180 Weighted average exercise price per share, beginning balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1181 Remaining Average Useful Life Concept (xbrli:durationItemType) For Period clls:WeightedAverageRemainingContractualLifeOfOutstandingShareOptionsPeriod
1182 Weighted average exercise price per share, granted Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
1183 Weighted average exercise price per share, exercised Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
1184 Weighted average exercise price per share, forfeited or expired Concept (Monetary) For Period clls:WeightedAverageExercisePriceOfShareOptionsForfeitedOrExpiredInSharebasedPaymentArrangement
1185 Weighted average exercise price per share, ending balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
1186 1092 - Disclosure - Share-Based Payment - Summary of Number of Shares Outstanding and Weighted Average Grant Date Fair Value (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureShareBasedPaymentSummaryOfNumberOfSharesOutstandingAndWeightedAverageGrantDateFairValue
1187 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1188 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1189 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1190 S A free shares [member] Member clls:SAFreeSharesMember
1191 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1192 Number of free shares outstanding, beginning balance Concept (Decimal) As Of clls:NumberOfShareOptionsUnvestedInShareBasedPaymentArrangement
1193 Number of free shares outstanding, granted Concept (Decimal) For Period clls:NumberOfShareOptionsUnvestedGrantedInShareBasedPaymentArrangement
1194 Number of free shares outstanding, vested Concept (Decimal) For Period clls:NumberOfShareOptionsUnvestedVestedInShareBasedPaymentArrangement
1195 Number of free shares outstanding, cancelled Concept (Decimal) For Period clls:NumberOfShareOptionsUnvestedCancelledInShareBasedPaymentArrangement
1196 Number of free shares outstanding, ending balance Concept (Decimal) As Of clls:NumberOfShareOptionsUnvestedInShareBasedPaymentArrangement
1197 Weighted average grant date fair Value, beginning balance Concept (Monetary) For Period clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsBeginningBalance
1198 Weighted average grant date fair Value, granted Concept (Monetary) For Period clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsGranted
1199 Weighted average grant date fair value, vested Concept (Monetary) For Period clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsVested
1200 Weighted average grant date fair Value, cancelled Concept (Monetary) For Period clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsCancelled
1201 Weighted average grant date fair value, ending balance Concept (Monetary) As Of clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsEndingBalance
1202 1093 - Disclosure - Share-Based Payments - Calyxt Eqity Summary of Vesting Details (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureShareBasedPaymentsCalyxtEqitySummaryOfVestingDetails
1203 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1204 Range [axis] Axis ifrs-full:RangeAxis
1205 Ranges [member] Member ifrs-full:RangesMember
1206 Bottom of Range [member] Member ifrs-full:BottomOfRangeMember
1207 Top of Range [member] Member ifrs-full:TopOfRangeMember
1208 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1209 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1210 Calyxt Inc. [member] Member clls:CalyxtMember
1211 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1212 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1213 Stock options [member] Member clls:StockOption1Member
1214 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1215 Weighted-Average fair values of stock options granted Concept (Share) For Period clls:WeightedAverageSharePriceShareOptionsGrantedPerShare
1216 Risk-free interest rate Concept (Percent) For Period clls:RiskFreeInterestRate
1217 Share entitlement per options Concept (Share) For Period clls:ExercisePriceShareEntitlementPerOptionsPerShare
1218 Exercise price Concept (Share) For Period clls:ExercisePricePerShareOptionsGranted
1219 Grant date share fair value Concept (Share) For Period clls:WeightedAverageFairValueAtMeasurementDateShareOptionsGrantedPerShare
1220 Expected volatility Concept (Percent) For Period ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
1221 Expected term (in years) Concept (xbrli:durationItemType) For Period clls:ExpectedTermsOfYears
1222 Vesting conditions Concept (Text/String) For Period clls:DescriptionOfVestingConditionsForSharebasedPaymentArrangement
1223 Vesting period Concept (Text/String) For Period clls:DescriptionOfShareBasedPaymentArrangementVestingPeriod
1224 1094 - Disclosure - Share-Based Payments - Summary of Number of Shares Outstanding and Weighted Average Grant Date Fair Value (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureShareBasedPaymentsSummaryOfNumberOfSharesOutstandingAndWeightedAverageGrantDateFairValue
1225 Disclosure of terms and conditions of share-based payment arrangement [table] Table

*

*

 ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
1226 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1227 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1228 RSU Calyxt 2017 [member] Member clls:RestrictedStockUnitMember
1229 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1230 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1231 Calyxt Inc. [member] Member clls:CalyxtMember
1232 Disclosure of terms and conditions of share-based payment arrangement [line items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
1233 Number of free shares outstanding, beginning balance Concept (Decimal) As Of clls:NumberOfShareOptionsUnvestedInShareBasedPaymentArrangement
1234 Number of restricted stock units outstanding, granted Concept (Decimal) For Period clls:NumberOfShareOptionsUnvestedGrantedInShareBasedPaymentArrangement
1235 Number of restricted stock units outstanding, vested Concept (Decimal) For Period clls:NumberOfShareOptionsUnvestedVestedInShareBasedPaymentArrangement
1236 Number of restricted stock units outstanding, cancelled Concept (Decimal) For Period clls:NumberOfShareOptionsUnvestedCancelledInShareBasedPaymentArrangement
1237 Number of free shares outstanding, ending balance Concept (Decimal) As Of clls:NumberOfShareOptionsUnvestedInShareBasedPaymentArrangement
1238 Weighted average grant date fair Value, beginning balance Concept (Monetary) For Period clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsBeginningBalance
1239 Weighted average grant date fair Value, granted Concept (Monetary) For Period clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsGranted
1240 Weighted average grant date fair value, vested Concept (Monetary) For Period clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsVested
1241 Weighted average grant date fair Value, cancelled Concept (Monetary) For Period clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsCancelled
1242 Weighted average grant date fair value, ending balance Concept (Monetary) As Of clls:WeightedAverageGrantDateFairValuePerShareOtherEquityInstrumentsEndingBalance
1243 1095 - Disclosure - Earnings Per Share - Details of Earnings Per Share (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureEarningsPerShareDetailsOfEarningsPerShare
1244 Implied Table Table

*

*

 implied:Table
1245 Earnings per share [abstract] Abstract ifrs-full:EarningsPerShareAbstract
1246 Net income (loss) attributable to shareholders of Cellectis ($ in thousands) Concept (Monetary) For Period Credit ifrs-full:ProfitLossAttributableToOrdinaryEquityHoldersOfParentEntity
1247 Adjusted weighted average number of outstanding shares, used to calculate both basic and diluted net result per share Concept (Shares) For Period ifrs-full:WeightedAverageShares
1248 Basic net income (loss) per share ($ /share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
1249 Diluted net income (loss) per share ($ /share) Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
1250 1096 - Disclosure - Provisions - Summary of Provisions for Termination Benefits (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureProvisionsSummaryOfProvisionsForTerminationBenefits
1251 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
1252 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1253 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1254 Pension [member] Member clls:PensionMember
1255 Loss on Contract [member] Member clls:LossOnContractMember
1256 Employee Litigation and Severance [member] Member clls:EmployeeLitigationAndSeveranceMember
1257 Commercial litigation [member] Member clls:CommercialLitigationMember
1258 Redundancy Plan [member] Member clls:RedundancyPlanMember
1259 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1260 Beginning balance Concept (Monetary) As Of Credit clls:ProvisionsForTerminationBenefits
1261 Pension, Additions Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsAdditions
1262 Additions Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInNetDefinedBenefitLiabilityAsset
1263 Pension, Amounts used during the period Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsDuringThePeriod
1264 Amounts used during the period Concept (Monetary) For Period Debit ifrs-full:BenefitsPaidOrPayable
1265 Pension, Reversals Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsReversals
1266 OCI Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsOtherComprehensiveIncome
1267 Ending balance Concept (Monetary) As Of Credit clls:ProvisionsForTerminationBenefits
1268 Loss on contract, Beginning balance Concept (Monetary) As Of Credit clls:ProvisionsOnLossOnContract
1269 Non current provisions beginning balance Concept (Monetary) As Of Credit clls:ProvisionsForTerminationBenefitsNoncurrentProvisions
1270 Loss on contract, Additions Concept (Monetary) For Period Credit clls:Provisionsoflossoncontractadditions
1271 Non current provisions additions Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsAdditionsNoncurrentProvisions
1272 Loss on contract, Amounts used during the period Concept (Monetary) For Period Credit clls:ProvisionsForLossOnContractAmountsUsedDuringThePeriod
1273 Non current provisions Amounts used during period Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsDuringThePeriodNoncurrentProvisions
1274 Loss on contract, Reversals Concept (Monetary) For Period Credit clls:ProvisionsForLossOnContractReversal
1275 Non current provisions Reversals Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsReversalsNoncurrentProvisions
1276 Loss on contract, OCI Concept (Monetary) For Period Credit clls:ProvisionsForLossOnContractOtherComprehensiveIncome
1277 Non current provisions OCI Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsOtherComprehensiveIncomeNoncurrentProvisions
1278 Loss on contract, Ending balance Concept (Monetary) As Of Credit clls:ProvisionsOnLossOnContract
1279 Non current provisions Ending balance Concept (Monetary) As Of Credit clls:ProvisionsForTerminationBenefitsNoncurrentProvisions
1280 Employee litigation and severance, Beginning balance Concept (Monetary) As Of Credit clls:ProvisionsForEmployeeLitigationAndServerance
1281 Current provisions beginning balance Concept (Monetary) As Of Credit clls:ProvisionsForTerminationBenefitsCurrentProvisions
1282 Employee litigation and severance, Additions Concept (Monetary) For Period Credit clls:ProvisionsForEmployeeLitigationAndSeveranceAdditions
1283 Current provisions additions Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsAdditionsCurrentProvisions
1284 Employee litigation and severance, Amounts used during the period Concept (Monetary) For Period Credit clls:ProvisionsForEmployeeLitigationAndSeveranceAmountsUsedDuringThePeriod
1285 Current provisions Amounts used during period Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsDuringThePeriodCurrentProvisions
1286 Employee litigation and severance, Reversals Concept (Monetary) For Period Credit clls:ProvisionsForEmployeeLitigationAndSeveranceReversal
1287 Current provisions Reversals Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsReversalsCurrentProvisions
1288 Employee litigation and severance, OCI Concept (Monetary) For Period Credit clls:ProvisionsForEmployeeLitigationAndSeveranceOtherComprehensiveIncome
1289 Current provisions OCI Concept (Monetary) For Period Credit clls:ProvisionsForTerminationBenefitsOtherComprehensiveIncomeCurrentProvisions
1290 Employee litigation and severance, Ending balance Concept (Monetary) As Of Credit clls:ProvisionsForEmployeeLitigationAndServerance
1291 Current provisions Ending balance Concept (Monetary) As Of Credit clls:ProvisionsForTerminationBenefitsCurrentProvisions
1292 Commercial litigation, Beginning balance Concept (Monetary) As Of Credit clls:CommercialLitigations
1293 Commercial litigation, Additions Concept (Monetary) For Period Credit clls:CommercialLitigationsAdditions
1294 Commercial litigation, Amounts used during the period Concept (Monetary) For Period Credit clls:CommercialLitigationAmountsUsedDuringThePeriod
1295 Commercial litigation, Reversals Concept (Monetary) For Period Credit clls:CommercialLitigationsReversal
1296 Commercial litigation, OCI Concept (Monetary) For Period Credit clls:CommercialLitigationOtherComprehensiveIncome
1297 Commercial litigation, Ending balance Concept (Monetary) As Of Credit clls:CommercialLitigations
1298 Redundancy plan, Beginning balance Concept (Monetary) As Of Credit clls:RedundancyPlans
1299 Redundancy plan, Additions Concept (Monetary) For Period Credit clls:RedundancyPlansAdditions
1300 Redundancy plan, Amounts used during the period Concept (Monetary) For Period Credit clls:RedundancyPlansAdditionsAmountsUsedDuringThePeriod
1301 Redundancy plan, Reversals Concept (Monetary) For Period Credit clls:RedundancyPlansReversals
1302 Redundancy plan, OCI Concept (Monetary) For Period Credit clls:RedundancyPlansOtherComprehensiveIncome
1303 Redundancy plan, Ending balance Concept (Monetary) As Of Credit clls:RedundancyPlans
1304 1097 - Disclosure - Provisions - Additional Information (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureProvisionsAdditionalInformation
1305 Disclosure of defined benefit plans [table] Table

*

*

 ifrs-full:DisclosureOfDefinedBenefitPlansTable
1306 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1307 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1308 United States [member] Member country:US
1309 France [member] Member country:FR
1310 Defined benefit plans [axis] Axis ifrs-full:DefinedBenefitPlansAxis
1311 Defined benefit plans [member] Member ifrs-full:DefinedBenefitPlansMember
1312 Operating charges with suppliers [Member] Member clls:OperatingChargesWithSuppliersMember
1313 Pension service cost [member] Member clls:PensionServiceCostMember
1314 Operating lease rentals [member] Member clls:OperatingLeaseRentalsMember
1315 Commercial litigation [member] Member clls:CommercialLitigationMember
1316 Disclosure of defined benefit plans [line items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
1317 Provisions for termination benefits Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInNetDefinedBenefitLiabilityAsset
1318 Actuarial liabilities of benefit plan Concept (Monetary) For Period Debit ifrs-full:PostemploymentBenefitExpenseDefinedContributionPlans
1319 Defined benefit plan Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1320 Employee termination, legal compensation calculation Concept (Text/String) For Period clls:DescriptionOfEmployeeTerminationCompensationCalculation
1321 1098 - Disclosure - Provisions - Schedule of Estimation of Retirement Indemnity to Employee (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureProvisionsScheduleOfEstimationOfRetirementIndemnityToEmployee
1322 Implied Table Table

*

*

 implied:Table
1323 Disclosure of defined benefit plans [abstract] Abstract ifrs-full:DisclosureOfDefinedBenefitPlansAbstract
1324 % social security contributions Concept (Percent) For Period clls:EstimationOfRetirementIndemnityToEmployeeSocialSecurityContributionsPercentage
1325 Salary increases Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
1326 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
1327 Terms of retirement Concept (Text/String) For Period ifrs-full:DescriptionOfTypeOfRetirementBenefitPlan
1328 Retirement age Concept (Integer) For Period clls:RetirementAge
1329 1099 - Disclosure - Provisions - Summary of Net Defined Benefit Liability and Components (Detail) Network

*

*

 http://www.cellectis.com/taxonomy/role/DisclosureProvisionsSummaryOfNetDefinedBenefitLiabilityAndComponents
1330 Implied Table Table

*

*

 implied:Table
1331 Disclosure of net defined benefit liability (asset) [abstract] Abstract ifrs-full:DisclosureOfNetDefinedBenefitLiabilityAssetAbstract
1332 Beginning balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1333 Current service cost Concept (Monetary) For Period Credit ifrs-full:CurrentServiceCostNetDefinedBenefitLiabilityAsset
1334 Interest cost Concept (Monetary) For Period Credit ifrs-full:InterestExpenseIncomeNetDefinedBenefitLiabilityAsset
1335 Benefit paid Concept (Monetary) For Period Debit ifrs-full:PaymentsInRespectOfSettlementsNetDefinedBenefitLiabilityAsset
1336 Actuarial gains and losses Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
1337 Reclassification/CTA Concept (Monetary) For Period Credit clls:LiabilityAssetOfDefinedBenefitPlansReclassification
1338 Ending balance Concept (Monetary) As Of Credit ifrs-full:LiabilityAssetOfDefinedBenefitPlans
1339 1100 - Disclosure - Commitments - Schedule of Commitments (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureCommitmentsScheduleOfCommitments
1340 Disclosure of contingent liabilities [table] Table

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 ifrs-full:DisclosureOfContingentLiabilitiesTable
1341 Maturity [axis] Axis ifrs-full:MaturityAxis
1342 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1343 Less than One Year [member] Member ifrs-full:NotLaterThanOneYearMember
1344 1-3 years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
1345 3-5 years [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
1346 More than Five Years [member] Member ifrs-full:LaterThanFiveYearsMember
1347 Property, plant and equipment by operating lease status [axis] Axis ifrs-full:PropertyPlantAndEquipmentByOperatingLeaseStatusAxis
1348 Property, plant and equipment by operating lease status [member] Member ifrs-full:PropertyPlantAndEquipmentByOperatingLeaseStatusMember
1349 Sale and Lease-Back Agreement [member] Member clls:SaleAndLeaseBackAgreementMember
1350 Facility Lease Agreements [member] Member clls:FacilityLeaseAgreementsMember
1351 License Agreements [member] Member clls:LicenseAgreementsMember
1352 Manufacturing Agreements [member] Member clls:ManufacturingAgreementsMember
1353 Other Agreements [member] Member clls:OtherAgreementsMember
1354 Disclosure of contingent liabilities [line items] LineItems ifrs-full:DisclosureOfContingentLiabilitiesLineItems
1355 Total contractual obligations Concept (Monetary) As Of Credit ifrs-full:ContractualCapitalCommitments
1356 1101 - Disclosure - Related Parties - Additional Information (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureRelatedPartiesAdditionalInformation
1357 Disclosure of transactions between related parties [table] Table

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 ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
1358 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
1359 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
1360 Mr. Godard [member] Member ifrs-full:KeyManagementPersonnelOfEntityOrParentMember
1361 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
1362 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
1363 Non-Employee Warrant One [member] Member clls:NonEmployeeWarrantOneMember
1364 Non-Employee Warrant Two [member] Member clls:NonEmployeeWarrantTwoMember
1365 Non-Employee Warrant Three [member] Member clls:NonEmployeeWarrantThreeMember
1366 Non-Employee Warrant Four [member] Member clls:NonEmployeeWarrantFourMember
1367 Non Employee Warrant Five [member] Member clls:NonEmployeeWarrantFiveMember
1368 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
1369 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
1370 Restricted Stock Units [member] Member clls:RestrictedStockUnitsMember
1371 Subsidiaries [axis] Axis ifrs-full:SignificantInvestmentsInSubsidiariesAxis
1372 Entity's total for subsidiaries [member] Member ifrs-full:EntitysTotalForSubsidiariesMember
1373 Calyxt Inc [member] Member clls:CalyxtIncMember
1374 Segment consolidation items [axis] Axis ifrs-full:SegmentConsolidationItemsAxis
1375 Entity's total for segment consolidation items [member] Member ifrs-full:EntitysTotalForSegmentConsolidationItemsMember
1376 Cellectis [member] Member clls:CellectisMember
1377 Disclosure of transactions between related parties [line items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
1378 Key management personnel compensation, short-term employee benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
1379 Key management personnel compensation, share-based payments in shares Concept (Shares) For Period clls:KeyManagementPersonnelCompensationShareBasedPaymentsInShares
1380 Key management personnel non-cash stock-based compensation expense recognized Concept (Monetary) For Period Debit clls:KeyManagementPersonnelNoncashStockbasedCompensationExpenseRecognized
1381 Number of service agreements Concept (Integer) For Period clls:NumberOfServiceAgreements
1382 Compensation paid for consultancy services Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensation
1383 Transactions with related parties, amount outstanding Concept (Monetary) As Of Credit clls:TransactionsWithRelatedPartiesAmountOutstanding
1384 Number of non-employee warrants exercisable to obtain shares Concept (Shares) As Of clls:NumberOfNonEmployeeWarrantsExercisableToObtainShares
1385 Number of shares to be obtained upon exercise of warrants Concept (Shares) As Of clls:NumberOfSharesToBeObtainedUponExerciseOfWarrants
1386 Number of shares to be obtained upon exercise of warrants, strike price Concept (Share) As Of clls:NumberOfSharesToBeObtainedUponExerciseOfWarrantsStrikePrice
1387 Purchase of common stock Concept (Shares) For Period clls:NumberOfOrdinarySharesRepurchased
1388 Purchase of common stock Concept (Shares) For Period clls:NumberOfSharesPurchased
1389 Purchase of common shares price per share Concept (Share) As Of clls:SharesPurchasedPricePerShare
1390 1102 - Disclosure - Subsequent Events - Additional Information (Detail) Network

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 http://www.cellectis.com/taxonomy/role/DisclosureSubsequentEventsAdditionalInformation
1391 Disclosure of non-adjusting events after reporting period [table] Table

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 ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodTable
1392 Non-adjusting events after reporting period [axis] Axis ifrs-full:NonadjustingEventsAfterReportingPeriodAxis
1393 Non-adjusting events after reporting period [member] Member ifrs-full:NonadjustingEventsMember
1394 IMPACT [member] Member clls:InnovativeManufacturingPlantForAllogeneicCellularTherapiesMember
1395 Liabilities arising from financing activities [axis] Axis ifrs-full:LiabilitiesArisingFromFinancingActivitiesAxis
1396 Liabilities arising from financing activities [member] Member ifrs-full:LiabilitiesArisingFromFinancingActivitiesMember
1397 Lease agreement [member] Member clls:LeaseAgreementMember
1398 Disclosure of non-adjusting events after reporting period [line items] LineItems ifrs-full:DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
1399 Commercial- scale manufacturing facility area Concept (num:areaItemType) For Period clls:CommercialScaleManufacturingFacilityArea

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