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

Line Label Object Class Period Type Balance Report ElementName
1 100000 - Document - Document and Entity Information Network

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2 Implied Table Table

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3 Documentand Entity Information [Abstract] Abstract eryp: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 100010 - Statement - Consolidated Statements of Income (Loss) Network

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18 Implied Table Table

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19 Income Statement [Abstract] Abstract ifrs-full:IncomeStatementAbstract
20 Operating income Abstract eryp:OperatingIncomeAbstract
21 Revenues Concept (Monetary) For Period Credit ifrs-full:Revenue
22 Other income Concept (Monetary) For Period Credit ifrs-full:OtherIncome
23 Total operating income Concept (Monetary) For Period Credit ifrs-full:RevenueAndOperatingIncome
24 Operating expenses Abstract eryp:OperatingExpenses1Abstract
25 Research and development expenses Concept (Monetary) For Period Debit ifrs-full:ResearchAndDevelopmentExpense
26 General and administrative expenses Concept (Monetary) For Period Debit ifrs-full:GeneralAndAdministrativeExpense
27 Total operating expenses Concept (Monetary) For Period Debit ifrs-full:OperatingExpense
28 Operating loss Concept (Monetary) For Period Credit ifrs-full:ProfitLossFromOperatingActivities
29 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
30 Financial expenses Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
31 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
32 Income tax Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
33 Net loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
34 Basic / Diluted loss per share (€/share) Concept (Share) For Period ifrs-full:BasicAndDilutedEarningsLossPerShare
35 100020 - Statement - Consolidated Statements of Comprehensive Income (Loss) Network

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36 Implied Table Table

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37 Statement Of Comprehensive Income [Abstract] Abstract ifrs-full:StatementOfComprehensiveIncomeAbstract
38 Net loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
39 Elements that may be reclassified subsequently to income (loss) Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillBeReclassifiedToProfitOrLossNetOfTaxAbstract
40 Foreign subsidiary – Currency translation adjustment Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeNetOfTaxExchangeDifferencesOnTranslation
41 Elements that may not be reclassified subsequently to income (loss) Abstract ifrs-full:ComponentsOfOtherComprehensiveIncomeThatWillNotBeReclassifiedToProfitOrLossNetOfTaxAbstract
42 Actuarial gains or losses on defined benefits liability Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncomeBeforeTaxGainsLossesOnRemeasurementsOfDefinedBenefitPlans
43 Tax effect Concept (Monetary) For Period Debit ifrs-full:IncomeTaxRelatingToRemeasurementsOfDefinedBenefitPlansOfOtherComprehensiveIncome
44 Other comprehensive income (loss) Concept (Monetary) For Period eryp:OtherComprehensiveIncomeLoss
45 Total comprehensive loss Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
46 100030 - Statement - Consolidated Statements of Financial Position Network

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47 Implied Table Table

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48 Statement Of Financial Position [Abstract] Abstract ifrs-full:StatementOfFinancialPositionAbstract
49 ASSETS Abstract ifrs-full:AssetsAbstract
50 Non-current assets Abstract ifrs-full:NoncurrentAssetsAbstract
51 Intangible assets Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
52 Property, plant and equipment Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
53 Other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
54 Total non-current assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentAssets
55 Current assets Abstract ifrs-full:CurrentAssetsAbstract
56 Inventories Concept (Monetary) As Of Debit ifrs-full:Inventories
57 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
58 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
59 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
60 Total current assets Concept (Monetary) As Of Debit ifrs-full:CurrentAssets
61 TOTAL ASSETS Concept (Monetary) As Of Debit ifrs-full:Assets
62 LIABILITIES AND SHAREHOLDERS’ EQUITY Abstract ifrs-full:EquityAndLiabilitiesAbstract
63 Shareholders’ equity Abstract ifrs-full:EquityAbstract
64 Share capital Concept (Monetary) As Of Credit ifrs-full:IssuedCapital
65 Premiums related to share capital Concept (Monetary) As Of Credit ifrs-full:SharePremium
66 Reserves Concept (Monetary) As Of Credit ifrs-full:CapitalReserve
67 Translation reserve Concept (Monetary) As Of Credit ifrs-full:ReserveOfExchangeDifferencesOnTranslation
68 Net loss for the period Concept (Monetary) As Of Credit ifrs-full:RetainedEarnings
69 Total shareholders’ equity Concept (Monetary) As Of Credit ifrs-full:Equity
70 Non-current liabilities Abstract ifrs-full:NoncurrentLiabilitiesAbstract
71 Long-term provisions Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
72 Financial liabilities – non-current portion Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
73 Deferred tax Concept (Monetary) As Of Credit ifrs-full:NetDeferredTaxLiabilities
74 Total Non-current liabilities Concept (Monetary) As Of Credit ifrs-full:NoncurrentLiabilities
75 Current liabilities Abstract ifrs-full:CurrentLiabilitiesAbstract
76 Financial liabilities – current portion Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
77 Trade and other payables Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherCurrentPayables
78 Other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
79 Total current liabilities Concept (Monetary) As Of Credit ifrs-full:CurrentLiabilities
80 TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY Concept (Monetary) As Of Credit ifrs-full:EquityAndLiabilities
81 100040 - Statement - Consolidated Statements of Cash flow Network

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82 Implied Table Table

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83 Statement Of Cash Flows [Abstract] Abstract ifrs-full:StatementOfCashFlowsAbstract
84 Cash flows used in operating activities Abstract ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
85 Net loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
86 Reconciliation of net loss and the cash used for operating activities Abstract ifrs-full:AdjustmentsForReconcileProfitLossAbstract
87 Gain or loss on exchange (calculated) Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForUnrealisedForeignExchangeLossesGains
88 Amortization and depreciation Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
89 Provision – non-current portion Concept (Monetary) For Period Debit eryp:AdjustmentsForNoncurrentProvisions
90 Expenses related to share-based payments Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForSharebasedPayments
91 Interest expense Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForInterestExpense
92 Income tax expense Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncomeTaxExpense
93 Change in trade and payables in foreign currency Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAccountPayable
94 Operating cash flow before change in working capital Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital
95 (Increase) decrease in inventories Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
96 (Increase) decrease in trade and other receivables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAndOtherReceivables
97 (Increase) decrease in other current assets Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForDecreaseIncreaseInOtherCurrentAssets
98 Increase (decrease) in trade and other payables Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
99 Increase (decrease) in other current liabilities Concept (Monetary) For Period Debit ifrs-full:AdjustmentsForIncreaseDecreaseInOtherCurrentLiabilities
100 Increase (decrease) in provisions - current portion Concept (Monetary) For Period Debit eryp:AdjustmentsForIncreaseDecreaseInCurrentProvisions
101 Change in working capital Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseInWorkingCapital
102 Net cash flow used in operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
103 Cash flows used in investing activities Abstract ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
104 Acquisition of property, plant and equipment Concept (Monetary) For Period Credit ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
105 Acquisitions of intangible assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfIntangibleAssetsClassifiedAsInvestingActivities
106 Acquisition of other non-current financial assets Concept (Monetary) For Period Credit ifrs-full:PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities
107 Disposal of property, plant and equipment Concept (Monetary) For Period Debit ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
108 Disposal of non-current financial assets Concept (Monetary) For Period Debit ifrs-full:ProceedsFromOtherLongtermAssetsClassifiedAsInvestingActivities
109 Net cash flow used in investing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInInvestingActivities
110 Cash flows from (used in) financing activities Abstract ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
111 Capital increases, net of transaction costs Concept (Monetary) For Period Debit eryp:IncreaseDecreaseInCapitalNetOfTransactionCosts
112 Proceeds from borrowings Concept (Monetary) For Period Debit ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
113 Repayment of borrowings Concept (Monetary) For Period Credit ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
114 Treasury shares Concept (Monetary) For Period Debit ifrs-full:PurchaseOfTreasuryShares
115 Net cash flow from (used in) financing activities Concept (Monetary) For Period Debit ifrs-full:CashFlowsFromUsedInFinancingActivities
116 Change rate effect on cash in foreign currency Concept (Monetary) For Period Debit ifrs-full:EffectOfExchangeRateChangesOnCashAndCashEquivalents
117 Increase / Decrease in cash and cash equivalents Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
118 Net cash and cash equivalents at the beginning of the period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
119 Net cash and cash equivalents at the closing of the period Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
120 Supplemental disclosure of cash flows information Abstract eryp:SupplementalDisclosureOfCashFlowInformationAbstract
121 Cash paid for interest Concept (Monetary) For Period Credit ifrs-full:InterestPaidClassifiedAsFinancingActivities
122 Cash paid for income tax Concept (Monetary) For Period Credit ifrs-full:IncomeTaxesPaidRefundClassifiedAsFinancingActivities
123 100050 - Statement - Consolidated Statement of Changes in Shareholders' Equity Network

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 http://erytech.com/20181231/taxonomy/role/StatementConsolidatedStatementOfChangesInShareholdersEquity
124 Statement Of Changes In Equity [Table] Table

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 ifrs-full:StatementOfChangesInEquityTable
125 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
126 Equity [member] Member ifrs-full:EquityMember
127 Amount Member ifrs-full:IssuedCapitalMember
128 Premiums related to the share capital Member ifrs-full:SharePremiumMember
129 Reserves Member ifrs-full:CapitalReserveMember
130 Translation reserve Member ifrs-full:ReserveOfExchangeDifferencesOnTranslationMember
131 Net (income) loss Member ifrs-full:AccumulatedOtherComprehensiveIncomeMember
132 Statement Of Changes In Equity [Line Items] LineItems ifrs-full:StatementOfChangesInEquityLineItems
133 Beginning balance Concept (Monetary) As Of Credit ifrs-full:Equity
134 Net loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
135 Other comprehensive income Concept (Monetary) For Period Credit ifrs-full:OtherComprehensiveIncome
136 Total comprehensive loss Concept (Monetary) For Period Credit ifrs-full:ComprehensiveIncome
137 Allocation of prior period loss Concept (Monetary) For Period Debit eryp:AllocationOfPriorPeriodLoss
138 Issue of ordinary shares Concept (Monetary) For Period Credit ifrs-full:IssueOfEquity
139 Additional paid in capital Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughOtherContributionsByOwners
140 Share-based payment Concept (Monetary) For Period Credit ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
141 Ending balance Concept (Monetary) As Of Credit ifrs-full:Equity
142 100060 - Statement - Consolidated Statement of Changes in Shareholders' Equity (Parenthetical) Network

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143 Implied Table Table

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144 Statement Of Changes In Equity [Abstract] Abstract ifrs-full:StatementOfChangesInEquityAbstract
145 Proceeds from fund rasing, net of trasaction cost Concept (Monetary) For Period Debit ifrs-full:ProceedsFromIssueOfOrdinaryShares
146 100070 - Disclosure - Description of the Business Network

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147 Implied Table Table

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148 Disclosure Of Description Of Business [Abstract] Abstract eryp:DisclosureOfDescriptionOfBusinessAbstract
149 Description of the Business Concept (Text Block (HTML)) For Period eryp:DisclosureOfDescriptionOfBusinessExplanatory
150 100080 - Disclosure - Basis of Preparation Network

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151 Implied Table Table

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152 Disclosure Of Basis Of Presentation [Abstract] Abstract eryp:DisclosureOfBasisOfPresentationAbstract
153 Basis of Preparation Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
154 100090 - Disclosure - Statement of Compliance Network

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155 Implied Table Table

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156 Statement Of Compliance [Abstract] Abstract eryp:StatementOfComplianceAbstract
157 Statement of Compliance Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNotesAndOtherExplanatoryInformationExplanatory
158 100100 - Disclosure - Significant Accounting Policies Network

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159 Implied Table Table

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160 Disclosure Of Significant Investments In Subsidiaries [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
161 Significant Accounting Policies Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
162 100110 - Disclosure - Notes Related to the Consolidated Statement of Income (Loss) Network

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163 Implied Table Table

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164 Analysis Of Income And Expense [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
165 Notes Related to the Consolidated Statement of Income (Loss) Concept (Text Block (HTML)) For Period eryp:DisclosureOfConsolidatedStatementOfIncomeLossExplanatory
166 100120 - Disclosure - Notes Related to the Consolidated Statements of Financial Position Network

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167 Implied Table Table

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168 Subclassifications Of Assets Liabilities And Equities [Abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
169 Notes Related to the Consolidated Statements of Financial Position Concept (Text Block (HTML)) For Period eryp:DisclosureOfConsolidatedStatementsOfFinancialPositionExplanatory
170 100130 - Disclosure - Management of Financial Risks Network

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171 Implied Table Table

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172 Disclosures Of Financial Risk Management [Abstract] Abstract eryp:DisclosuresOfFinancialRiskManagementAbstract
173 Management of Financial Risks Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialRiskManagementExplanatory
174 100140 - Disclosure - Off-Balance Sheet Commitments Network

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175 Implied Table Table

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176 Disclosure Of Off Balance Sheet Commitments [Abstract] Abstract eryp:DisclosureOfOffBalanceSheetCommitmentsAbstract
177 Off-Balance Sheet Commitments Concept (Text Block (HTML)) For Period eryp:DisclosureOfOffBalanceSheetCommitmentsExplanatory
178 100150 - Disclosure - Significant Accounting Policies (Policies) Network

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179 Implied Table Table

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180 Disclosure Of Significant Investments In Subsidiaries [Abstract] Abstract ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesAbstract
181 Basis of consolidation Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForBasisOfConsolidationExplanatory
182 Intercompany transactions Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForIntercompanyTransactionsExplanatory
183 Foreign currencies Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForForeignCurrencyTranslationExplanatory
184 Consolidated statements of cash flows Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForCashFlowsExplanatory
185 Use of estimates and judgments Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForUseOfEstimatesAndJudgmentsExplanatory
186 Intangible assets Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForIntangibleAssetsExplanatory
187 Property, plant and equipment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
188 Impairment tests Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
189 Financial assets and liabilities - Measurement and Presentation Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForFinancialAssetsAndLiabilitiesExplanatory
190 Inventories Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForInventoriesExplanatory
191 Cash and cash equivalents Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForCashAndCashEquivalentsExplanatory
192 Provisions Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForProvisionsExplanatory
193 Lease agreements Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
194 Share capital Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForShareCapitalExplanatory
195 Share-based payment Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
196 Presentation of the statement of income (loss) Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForStatementOfIncomeLoss
197 Operating income Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForOperatingIncomeExplanatory
198 Financial income and expense Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForFinanceIncomeAndCostsExplanatory
199 Income taxes Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
200 Earnings per share Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
201 Segment reporting Concept (Text Block (HTML)) For Period ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
202 Off-balance sheet commitments Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForOffbalanceSheetCommitmentsExplanatory
203 Events After the Close of the Reporting Period Concept (Text Block (HTML)) For Period eryp:DescriptionOfAccountingPolicyForEventsAfterTheCloseOfReportingPeriodExplanatory
204 100160 - Disclosure - Significant Accounting Policies (Tables) Network

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205 Implied Table Table

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206 Disclosure Of Significant Accounting Policies [Abstract] Abstract eryp:DisclosureOfSignificantAccountingPoliciesAbstract
207 Summary of Details of the Company's Subsidiary Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesExplanatory
208 Summary of Intangible Assets with Definite Useful Life Concept (Text Block (HTML)) For Period eryp:DisclosureOfIntangibleAssetsWithDefiniteUsefulLifeExplanatory
209 Summary of Depreciation Periods of Property, Plant, and Equipment Item Concept (Text Block (HTML)) For Period eryp:DisclosureOfDepreciationEstimatedUsefulLifeExplanatory
210 100170 - Disclosure - Notes Related to the Consolidated Statement of Income (Loss) (Tables) Network

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211 Statement [Table] Table

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212 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
213 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
214 BSPCE plan [Member] Member eryp:BSPCEMember
215 BSA plan [Member] Member eryp:BSAMember
216 SO plan [Member] Member eryp:StockOptionsSOPlanMember
217 AGA Plan [Member] Member eryp:AGAMember
218 Statement [Line Items] LineItems us-gaap:StatementLineItems
219 Summary of Detailed Information of Operating Income Concept (Text Block (HTML)) For Period eryp:DisclosureOfDetailedInformationOfOperatingIncomeExplanatory
220 Summary of Operating Expense by Nature Concept (Text Block (HTML)) For Period eryp:DisclosureOfOperatingExpenseByNatureExplanatory
221 Summary of Personal Expenses Concept (Text Block (HTML)) For Period eryp:DisclosureOfEmployeeExpensesExplanatory
222 Summary of Subscription Warrants Concept (Text Block (HTML)) For Period eryp:DisclosureOfSubscriptionWarrantsExplanatory
223 Summary Assumptions Used Determine Fair Value of Plans Granted Concept (Text Block (HTML)) For Period eryp:DisclosureOfMainAssumptionsUsedToDetermineTheFairValueOfThePlansAllocatedExplanatory
224 Summary of Free Shares Concept (Text Block (HTML)) For Period eryp:DisclosureOfFreeSharesExplanatory
225 Summary of Depreciation and Amortization Expense Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDepreciationAndAmortisationExpenseExplanatory
226 Summary of Financial Income and Expense Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinanceIncomeExpenseExplanatory
227 Summary of Reconciliation of Effective Tax Rate Concept (Text Block (HTML)) For Period eryp:DisclosureOfReconciliationOfEffectiveTaxRateExplanatory
228 100170 - Disclosure - Notes Related to the Consolidated Statement of Income (Loss) (Tables) Network

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229 Implied Table Table

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230 Analysis Of Income And Expense [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
231 Summary of Stock Options Concept (Text Block (HTML)) For Period eryp:DisclosureOfStockOptionsExplanatory
232 Summary of Outstanding Instruments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfShareOptionsExplanatory
233 Summary of Number of Outstanding Free Shares Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfNumberAndWeightedAverageExercisePricesOfOtherEquityInstrumentsExplanatory
234 Summary of Breakdown of Plan Concept (Text Block (HTML)) For Period eryp:DisclosureOfFairValueOfEquityInstrumentsGrantedToEmployeesExplanatory
235 100180 - Disclosure - Notes Related to the Consolidated Statements of Financial Position (Tables) Network

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236 Implied Table Table

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237 Subclassifications Of Assets Liabilities And Equities [Abstract] Abstract ifrs-full:SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
238 Schedule of Intangible Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutIntangibleAssetsExplanatory
239 Schedule of Property, Plant and Equipment Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
240 Summary of Other Non-current Financial Assets Concept (Text Block (HTML)) For Period eryp:DisclosureOfOtherNonCurrentFinancialAssetsExplanatory
241 Schedule of Inventories Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfInventoriesExplanatory
242 Schedule of Trade and Other Receivables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherReceivablesExplanatory
243 Schedule of Other Current Assets Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherCurrentAssetsExplanatory
244 Summary of Cash and Cash Equivalents Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfCashAndCashEquivalentsExplanatory
245 Summary of Shareholders' Equity Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
246 Basic Earnings per Share and Diluted Earnings (Loss) per Share Concept (Text Block (HTML)) For Period ifrs-full:EarningsPerShareExplanatory
247 Summary of Details of Provisions Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfProvisionsExplanatory
248 Summary of Breakdown of Provisions Concept (Text Block (HTML)) For Period eryp:DisclosureOfDetailedInformationAboutBreakdownOfProvisionsExplanatory
249 Estimate of the Retirement Commitments Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDefinedBenefitPlansExplanatory
250 Summary of Financial Liabilities by Type Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfFinancialLiabilitiesExplanatory
251 Summary of Financial Liabilities by Maturity Concept (Text Block (HTML)) For Period ifrs-full:MaturityAnalysisForNonderivativeFinancialLiabilities
252 Summary of Main Terms of Agreements Concept (Text Block (HTML)) For Period eryp:DisclosureOfConditionalAdvancesExplanatory
253 Summary of Trade and Other Payables Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTradeAndOtherPayablesExplanatory
254 Disclosure of Other Current Liabilities Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfOtherCurrentLiabilitiesExplanatory
255 Summary of Transactions Between Related Parties Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
256 Summary of Financial Instruments Recognized in the Consolidated Statement of Financial Position and Effect on Net Income (Loss) Concept (Text Block (HTML)) For Period ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory
257 100190 - Disclosure - Management of Financial Risks (Tables) Network

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258 Implied Table Table

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259 Disclosures Of Financial Risk Management [Abstract] Abstract eryp:DisclosuresOfFinancialRiskManagementAbstract
260 Summary of Contractual Cash Flows of the Financial Liabilities Concept (Text Block (HTML)) For Period eryp:DisclosureOfContractualCashFlowsOfFinancialLiabilitiesExplanatory
261 100200 - Disclosure - Off-Balance Sheet Commitments (Tables) Network

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262 Implied Table Table

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291 Grant of stock-options Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
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322 Grant of stock-options Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
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324 Implied Table Table

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575 Grant In January 2017 [Member] Member eryp:GrantInJanuary2017Member
576 Grant In June 2017 [Member] Member eryp:GrantInJune2017Member
577 Grant In October2017 Member eryp:GrantInOctober2017Member
578 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
579 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
580 AGA 2016 [member] Member eryp:AGAP2016Member
581 AGA 2017 [member] Member eryp:AGA2017Member
582 AGA 2018 [member] Member eryp:AGA2018Member
583 Disclosure of detailed information of operating income [line items] LineItems eryp:DisclosureOfDetailedInformationOfOperatingIncomeLineItems
584 Performance criteria Concept (Text/String) For Period eryp:PerformanceTargetsCriteria
585 Share price Concept (Monetary) For Period eryp:SharePrice1
586 100370 - Disclosure - Notes Related to the Consolidated Statement of Income (Loss) - Summary of Outstanding Instruments (Detail) Network

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587 Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Table] Table

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588 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
589 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
590 Options with a ratio of 1 option = 10 share [member] Member eryp:OptionsWithRatioOfOneOptionEqualsToTenSharesMember
591 Options with a ratio of 1 option = 1 share [member] Member eryp:OptionsWithRatioOfOneOptionEqualsToOneSharesMember
592 Disclosure of Fair Value of Equity Instruments Granted [Line Items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
593 Number of options, beginning balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
594 Grant of stock-options Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
595 Number of options, forfeited during the year Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
596 Number of options, exercised during the year Concept (Decimal) For Period ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
597 Number of options, ending balance Concept (Decimal) As Of ifrs-full:NumberOfOutstandingShareOptions
598 Number of options, exercisable Concept (Decimal) As Of ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
599 Weighted-average exercise price, beginning balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
600 Weighted-average exercise price, granted during the year Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
601 Weighted-average exercise price, forfeited during the year Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
602 Weighted-average exercise price, exercised during the year Concept (Monetary) For Period ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
603 Weighted-average exercise price, ending balance Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
604 Weighted-average exercise price, exercisable Concept (Monetary) As Of ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
605 100380 - Disclosure - Notes Related to the Consolidated Statement of Income (Loss) - Summary of Number of Outstanding Free Share (Detail) Network

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606 Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Table] Table

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607 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
608 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
609 Free Shares (“AGA”) Plan [member] Member eryp:FreeSharesAGAPlanMember
610 Disclosure of Fair Value of Equity Instruments Granted [Line Items] LineItems ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
611 Outsatnding, beginning balance Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
612 Granted during the year Concept (Decimal) For Period ifrs-full:NumberOfInstrumentsOtherEquityInstrumentsGranted
613 Forfeited during the year Concept (Decimal) For Period ifrs-full:NumberOfOtherEquityInstrumentsForfeitedInSharebasedPaymentArrangement
614 Acquired during the year Concept (Decimal) For Period eryp:NumberOfOtherEquityInstrumentsAcquiredInSharebasedPaymentArrangement
615 Outstanding, ending balance Concept (Decimal) As Of ifrs-full:NumberOfOtherEquityInstrumentsOutstandingInSharebasedPaymentArrangement
616 100390 - Disclosure - Notes Analysis of Income and Expense - Summary of Breakdown of Plan Allocations (Detail) Network

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617 Disclosure Of Fair Value Of Plan Assets Table [Table] Table

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618 Types of share-based payment arrangements [axis] Axis ifrs-full:TypesOfSharebasedPaymentArrangementsAxis
619 Share-based payment arrangements [member] Member ifrs-full:SharebasedPaymentArrangementsMember
620 AGA Plan [Member] Member eryp:AGAMember
621 BSA plan [Member] Member eryp:BSAMember
622 BSPCE plan [Member] Member eryp:BSPCEMember
623 SO [Member] Member eryp:SOMember
624 Award Date Axis us-gaap:AwardDateAxis
625 Award Date Member us-gaap:AwardDateDomain
626 Free Shares Grant In October2016 Member eryp:FreeSharesGrantInOctober2016Member
627 Free Shares Grant In June2015 Member eryp:FreeSharesGrantInJune2015Member
628 Free Shares Grant In January2014 Member eryp:FreeSharesGrantInJanuary2014Member
629 Free Shares Grant In September2015 Member eryp:FreeSharesGrantInSeptember2015Member
630 Free Shares Grant In May2016 Member eryp:FreeSharesGrantInMay2016Member
631 Free Shares Grant In January2017 Member eryp:FreeSharesGrantInJanuary2017Member
632 Free Shares Grant In June2017 Member eryp:FreeSharesGrantInJune2017Member
633 Free Shares Grant In October2017 Member eryp:FreeSharesGrantInOctober2017Member
634 Free Shares Grant In January2018 Member eryp:FreeSharesGrantInJanuary2018Member
635 Free Shares Grant In September2018 Member eryp:FreeSharesGrantInSeptember2018Member
636 Title Of Individual Axis us-gaap:TitleOfIndividualAxis
637 Title Of Individual With Relationship To Entity Member us-gaap:TitleOfIndividualWithRelationshipToEntityDomain
638 Employees [Member] Member eryp:EmployeesMember
639 Executives [Member] Member eryp:ExecutivesMember
640 Directors [member] Member eryp:DirectorsMember
641 Disclosure of Fair Value of Equity Instruments Granted [Line Items] LineItems eryp:DisclosureOfFairValueOfEquityInstrumentsGrantedLineItems
642 Sharebased compensation expense recognized in profit (loss) Concept (Monetary) For Period Debit eryp:ExpenseFromSharebasedPaymentTransactionsRecognizedInProfitLoss
643 100400 - Disclosure - Notes Related to the Consolidated Statement of Income (Loss) - Summary of Depreciation and Amortization Expense (Detail) Network

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644 Disclosure Of Depreciation And Amortization [Table] Table

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645 Income Statement Location Axis us-gaap:IncomeStatementLocationAxis
646 Income Statement Location Member us-gaap:IncomeStatementLocationDomain
647 Clinical studies [member] Member eryp:ClinicalStudiesMember
648 Other research and development expenses [member] Member eryp:OtherResearchAndDevelopmentExpensesMember
649 Research and development expenses [member] Member eryp:ResearchAndDevelopmentExpensesMember
650 General and administrative expense [member] Member us-gaap:GeneralAndAdministrativeExpenseMember
651 Disclosure Of Depreciation And Amortization [Line Items] LineItems eryp:DisclosureOfDepreciationAndAmortizationLineItems
652 Depreciation and amortization expense Concept (Monetary) For Period Debit ifrs-full:DepreciationAndAmortisationExpense
653 100410 - Disclosure - Notes Related to the Consolidated Statement of Income (Loss) - Summary of Financial Income and Expense (Detail) Network

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654 Implied Table Table

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655 Analysis Of Income And Expense [Abstract] Abstract ifrs-full:AnalysisOfIncomeAndExpenseAbstract
656 Interest expense on finance leases Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnFinanceLeases
657 Interest expense related to borrowings Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnBorrowings
658 Interest expense on repayable loan Concept (Monetary) For Period Debit ifrs-full:InterestExpenseOnBankLoansAndOverdrafts
659 Other finance expenses Concept (Monetary) For Period Debit ifrs-full:OtherFinanceCost
660 Total financial expenses Concept (Monetary) For Period Debit ifrs-full:FinanceCosts
661 Income from short term deposits Concept (Monetary) For Period Credit eryp:IncomeFromShortTermDeposits
662 Other finance income Concept (Monetary) For Period Credit ifrs-full:OtherFinanceIncome
663 Total financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncome
664 Financial income Concept (Monetary) For Period Credit ifrs-full:FinanceIncomeCost
665 100420 - Disclosure - Notes Related to the Consolidated Statement of Income (Loss) - Summary of Reconciliation of Effective Tax Rate (Detail) Network

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666 Implied Table Table

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667 Reconciliation Of Accounting Profit Multiplied By Applicable Tax Rates [Abstract] Abstract ifrs-full:ReconciliationOfAccountingProfitMultipliedByApplicableTaxRatesAbstract
668 Loss before tax Concept (Monetary) For Period Credit ifrs-full:AccountingProfit
669 Theoretical tax expense or income Concept (Monetary) For Period Debit ifrs-full:TaxExpenseIncomeAtApplicableTaxRate
670 Current year loss not capitalized Concept (Monetary) For Period Debit eryp:TaxEffectOfNonCapitalizationOfDeferredTax
671 CICE (employment and competitiveness tax credit) not included in taxable income Concept (Monetary) For Period Credit eryp:TaxEffectOfEmploymentAndCompetitivenessTaxCreditNotIncludedInTaxableIncome
672 Research tax credits Concept (Monetary) For Period Debit eryp:TaxEffectFromResearchTaxCredit
673 Tax rate differences Concept (Monetary) For Period Debit ifrs-full:TaxEffectFromChangeInTaxRate
674 Share-based compensation expense Concept (Monetary) For Period Debit eryp:TaxEffectOfShareBasedCompensationExpense
675 Permanent differences Concept (Monetary) For Period Debit eryp:TaxEffectFromChangeInTaxRateLaw
676 Other differences Concept (Monetary) For Period Debit ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
677 Effective tax (loss)/income Concept (Monetary) For Period Debit ifrs-full:IncomeTaxExpenseContinuingOperations
678 100430 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Schedule of Intangible Assets (Detail) Network

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679 Disclosure Of Intangible Assets [Table] Table

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680 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
681 Carrying amount [member] Member ifrs-full:CarryingAmountMember
682 Gross carrying amount [member] Member ifrs-full:GrossCarryingAmountMember
683 Accumulated Amortization and Depreciation [member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
684 Classes of intangible assets other than goodwill [axis] Axis ifrs-full:ClassesOfIntangibleAssetsOtherThanGoodwillAxis
685 Intangible assets other than goodwill [member] Member ifrs-full:IntangibleAssetsOtherThanGoodwillMember
686 Other intangible assets [member] Member ifrs-full:OtherIntangibleAssetsMember
687 Disclosure Of Intangible Assets [Line Items] LineItems ifrs-full:DisclosureOfIntangibleAssetsLineItems
688 Beginning balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
689 Increase Concept (Monetary) For Period Debit ifrs-full:AdditionsOtherThanThroughBusinessCombinationsIntangibleAssetsOtherThanGoodwill
690 Increase Concept (Monetary) For Period Debit eryp:AmortisationAndIncreaseInIntangibleAssetsOtherThanGoodwill
691 Increase Concept (Monetary) For Period ifrs-full:AmortisationIntangibleAssetsOtherThanGoodwill
692 Decrease Concept (Monetary) For Period Credit eryp:DecreaseInIntangibleAssetsOtherThanGoodwill
693 Reclassification Concept (Monetary) For Period Debit ifrs-full:IncreaseDecreaseThroughTransfersIntangibleAssetsOtherThanGoodwill
694 Ending balance Concept (Monetary) As Of Debit ifrs-full:IntangibleAssetsOtherThanGoodwill
695 Reclassification Concept (Monetary) For Period Debit eryp:ReclassificationOfIntangibleAssetsOtherThanGoodwill
696 100440 - Disclosure - Notes Related to the Consolidated Statements of Financial position - Additional Information (Detail) Network

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697 Disclosure Of Property Plant And Equipment [Table] Table

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698 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
699 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
700 United States [member] Member country:US
701 France [member] Member country:FR
702 Borrowings by name [axis] Axis ifrs-full:BorrowingsByNameAxis
703 Borrowings by name [member] Member ifrs-full:BorrowingsByNameMember
704 Societe Generale [member] Member eryp:SocieteGeneraleMember
705 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
706 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
707 Bpi France [member] Member eryp:BpiFranceMember
708 Types of contracts [axis] Axis ifrs-full:TypesOfContractsAxis
709 Types of contracts [member] Member ifrs-full:TypesOfContractsMember
710 Pancreas project [member] Member eryp:PancreasProjectMember
711 GR-SIL project [member] Member eryp:GRSILProjectMember
712 Tedac project [member] Member eryp:TedacProjectMember
713 Contract duration [axis] Axis ifrs-full:ContractDurationAxis
714 Contract duration [member] Member ifrs-full:ContractDurationMember
715 Signature of agreement [member] Member eryp:SignatureOfAgreementMember
716 Milestones four [member] Member eryp:MilestonesFourMember
717 June thirty of first year in which cumulative sales condition is achieved [member] Member eryp:JuneThirtyOfFirstYearInWhichCumulativeSalesConditionIsAchievedMember
718 June thirty of second year in which cumulative sales condition is achieved [member] Member eryp:JuneThirtyOfSecondYearInWhichCumulativeSalesConditionIsAchievedMember
719 June thirty of third year in which cumulative sales condition is achieved [member] Member eryp:JuneThirtyOfThirdYearInWhichCumulativeSalesConditionIsAchievedMember
720 June thirty of fourth year in which cumulative sales condition is achieved [member] Member eryp:JuneThirtyOfFourthYearInWhichCumulativeSalesConditionIsAchievedMember
721 Second phase [member] Member eryp:SecondPhaseMember
722 Range [axis] Axis ifrs-full:RangeAxis
723 Ranges [member] Member ifrs-full:RangesMember
724 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
725 Top of range [member] Member ifrs-full:TopOfRangeMember
726 Notes Related To Consolidated Statements Of Financial Position [Line Items] LineItems eryp:NotesRelatedToConsolidatedStatementsOfFinancialPositionLineItems
727 Assets under construction Concept (Monetary) As Of Debit ifrs-full:ConstructionInProgress
728 Increase of assets under construction Concept (Monetary) For Period Debit eryp:IncreaseInAssetsUnderConstruction
729 Property, plant and equipment held under finance leases Concept (Monetary) As Of Debit eryp:PropertyPlantAndEquipmentHeldUnderFinanceLeases
730 Office equipment and computers held under finance leases Concept (Monetary) As Of Debit eryp:OfficeEquipmentAndComputersHeldUnderFinanceLeases
731 Advances payments to suppliers Concept (Monetary) As Of Debit eryp:PrepaymentsToSuppliers
732 Current accounts Concept (Monetary) For Period Debit eryp:CurrentAccountClassifiedAsCash
733 Term deposits Concept (Monetary) As Of Debit ifrs-full:ShorttermDepositsClassifiedAsCashEquivalents
734 Notice period for availability of term deposits Concept (xbrli:durationItemType) For Period eryp:NoticePeriodForAvailablilityOfTermDeposits
735 Maturities of term deposit Concept (Text/String) For Period eryp:TermDepositsMaturityPeriod
736 Number of shares fully paid up Concept (Shares) As Of ifrs-full:NumberOfSharesIssuedAndFullyPaid
737 Nominal value Concept (Share) As Of ifrs-full:ParValuePerShare
738 Costs of issuing ordinary shares Concept (Monetary) For Period Credit eryp:IssuanceCostOrdinaryShares
739 Number of shares that could be issued on the exercise of warrants and acquisition of free shares Concept (Shares) For Period ifrs-full:DilutiveEffectOfConvertibleInstrumentsOnNumberOfOrdinaryShares
740 Dispute settlement Concept (Monetary) For Period Debit eryp:DisputeSettlement
741 Residual conditional advance Concept (Monetary) For Period Debit eryp:ResidualConditionalAdvance
742 Reimbursement Concept (Monetary) As Of Debit eryp:ReimbursementOfDisputeAndResidualConditionalAdvance
743 Bank loan received Concept (Monetary) As Of Credit ifrs-full:SecuredBankLoansReceived
744 Interest rate Concept (Percent) As Of ifrs-full:BorrowingsInterestRate
745 Repayment terms Concept (Text/String) For Period eryp:BorrowingRepayablePeriod
746 Conditional advances repayable percentage Concept (Percent) For Period eryp:PercentageOfConditionalAdvancesRepayable
747 Advances received Concept (Monetary) As Of Credit eryp:ConditionalAdvanceGranted
748 Conditional advance payment Concept (Monetary) For Period Credit eryp:ConditionalAdvancePayment
749 Conditional advance received Concept (Monetary) As Of Credit eryp:ConditionalAdvanceReceived
750 Repayment upon achieving cumulative sales Concept (Monetary) For Period Credit eryp:RepaymentUponAchievingCumulativeSales
751 Condition of repayment: amount of cumulative sales Concept (Monetary) For Period Credit eryp:ConditionOfRepaymentAmountOfCumulativeSales
752 Repayment Concept (Monetary) For Period Credit eryp:RepaymentOfConditionalAdvance
753 Percentage of annuity equal to income generated through the sale of intellectual property rights Concept (Percent) For Period eryp:PercentageOfAnnuityEqualToIncomeGeneratedThroughTheSaleOfIntellectualPropertyRights
754 Conditional advance repayment limit Concept (Monetary) For Period Credit eryp:ConditionalAdvanceRepaymentLimit
755 Amount upon achieving cumulative sales Concept (Monetary) For Period Credit eryp:AmountUponAchievingCumulativeSales
756 Percentage of payment through the sale of intellectual property rights Concept (Percent) For Period eryp:PercentageOfPaymentThroughTheSaleOfIntellectualPropertyRights
757 Conditional advance repayment term Concept (xbrli:durationItemType) For Period eryp:ConditionalAdvanceRepaymentTerm
758 100450 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Schedule of Property, Plant and Equipment (Detail) Network

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759 Disclosure Of Property Plant And Equipment [Table] Table

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760 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
761 Carrying amount [member] Member ifrs-full:CarryingAmountMember
762 Gross carrying amount [member] Member ifrs-full:GrossCarryingAmountMember
763 Accumulated Amortization and Depreciation [member] Member ifrs-full:AccumulatedDepreciationAndAmortisationMember
764 Classes of property, plant and equipment [axis] Axis ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
765 Property, plant and equipment [member] Member ifrs-full:PropertyPlantAndEquipmentMember
766 Assets under construction [member] Member ifrs-full:ConstructionInProgressMember
767 Plant, equipment, and tooling [member] Member eryp:PlantEquipmentAndToolingMember
768 Fixtures and fittings [member] Member ifrs-full:FixturesAndFittingsMember
769 Office equipment and computers [member] Member eryp:OfficeEquipmentAndComputersMember
770 Disclosure Of Property Plant And Equipment [Line Items] LineItems ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
771 Beginning balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
772 Increase Concept (Monetary) For Period eryp:DepreciationAndIncreasePropertyPlantAndEquipment
773 Decrease Concept (Monetary) For Period Credit ifrs-full:DisposalsPropertyPlantAndEquipment
774 Reclassification Concept (Monetary) For Period Credit eryp:ReclassificationOfPropertyPlantAndEquipment
775 Ending balance Concept (Monetary) As Of Debit ifrs-full:PropertyPlantAndEquipment
776 100460 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Other Non-current Financial Assets (Detail) Network

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777 Implied Table Table

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778 Categories Of Noncurrent Financial Assets [Abstract] Abstract ifrs-full:CategoriesOfNoncurrentFinancialAssetsAbstract
779 Deposits related to leased premises Concept (Monetary) As Of Debit eryp:DepositsRelatedToLeasedPremises
780 Advance payments to suppliers Concept (Monetary) As Of Debit eryp:AdvancePaymentsToSuppliers
781 Other Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentNonfinancialAssets
782 Total other non-current financial assets Concept (Monetary) As Of Debit ifrs-full:OtherNoncurrentFinancialAssets
783 100470 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Schedule of Inventories (Detail) Network

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784 Implied Table Table

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785 Classes Of Inventories [Abstract] Abstract ifrs-full:ClassesOfInventoriesAbstract
786 Production inventory Concept (Monetary) As Of Debit ifrs-full:ProductionSupplies
787 Laboratory inventory Concept (Monetary) As Of Debit ifrs-full:RawMaterials
788 Total inventory Concept (Monetary) As Of Debit ifrs-full:Inventories
789 100480 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Schedule of Trade and Other Receivables (Detail) Network

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790 Implied Table Table

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791 Trade And Other Receivables [Abstract] Abstract ifrs-full:TradeAndOtherReceivablesAbstract
792 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivables
793 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherCurrentReceivables
794 100490 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Schedule of Other Current Assets (Detail) Network

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795 Implied Table Table

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796 Other Current Assets [Abstract] Abstract eryp:OtherCurrentAssetsAbstract
797 Research Tax Credit Concept (Monetary) For Period Debit eryp:ResearchTaxCredit
798 Tax receivables (e.g. VAT) and other receivables Concept (Monetary) As Of Debit eryp:TaxReceivablesAndOtherReceivablesCurrent
799 Cash to be received from bank related to exercise of warrants Concept (Monetary) As Of Debit eryp:CashToBeReceivedFromBankRelatedToExerciseOfWarrants
800 Prepaid expenses Concept (Monetary) As Of Debit ifrs-full:CurrentPrepayments
801 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
802 100500 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Cash and Cash Equivalents (Detail) Network

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803 Implied Table Table

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804 Disclosure Of Cash And Cash Equivalents [Abstract] Abstract eryp:DisclosureOfCashAndCashEquivalentsAbstract
805 Total cash and cash equivalents as reported in statementof financial position Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
806 Bank overdrafts Concept (Monetary) As Of Credit ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
807 Total cash and cash equivalents as reported in statement of cash flow Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalentsIfDifferentFromStatementOfFinancialPosition
808 100510 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Shareholders' Equity (Detail) Network

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809 Disclosure Of Classes Of Share Capital [Table] Table

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810 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
811 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
812 United States [member] Member country:US
813 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
814 Beginning balance Concept (Shares) As Of ifrs-full:NumberOfSharesIssuedAndFullyPaid
815 Follow-on offering Concept (Shares) For Period eryp:NumberOfSharesIssuedAndFullyPaidUnderFollowonOffering
816 Exercise of share warrants Concept (Shares) For Period eryp:NumberOfShareWarrantsExercised
817 Free shares / Stock options / Share warrants Concept (Shares) For Period eryp:NumberOfFreeSharesStockOptionsShareWarrants
818 Private placement with institutional investors in April Concept (Shares) For Period eryp:NumberOfSharesIssuedInPrivatePlacementWithInstitutionalInvestors
819 Initial public offering shares issued Concept (Shares) For Period eryp:NumberOfSharesIssuedInitialPublicOffering
820 Free shares Concept (Shares) For Period eryp:NumberOfFreeShares
821 Ending balance Concept (Shares) As Of ifrs-full:NumberOfSharesIssuedAndFullyPaid
822 100520 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Shareholders' Equity (Parenthetical) (Detail) Network

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823 Disclosure Of Classes Of Share Capital [Table] Table

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824 Components of equity [axis] Axis ifrs-full:ComponentsOfEquityAxis
825 Equity [member] Member ifrs-full:EquityMember
826 American depository scheme [member] Member eryp:AmericanDepositorySchemeMember
827 Disclosure of classes of share capital [line items] LineItems ifrs-full:DisclosureOfClassesOfShareCapitalLineItems
828 Initial Public Offering Concept (Shares) For Period eryp:NumberOfSharesIssuedInitialPublicOffering
829 100530 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Basic Earnings per Share and Diluted Earnings (Loss) per Share (Detail) Network

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830 Implied Table Table

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831 Earnings Per Share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
832 Net loss Concept (Monetary) For Period Credit ifrs-full:ProfitLoss
833 Weighted number of shares for the period Concept (Shares) For Period ifrs-full:WeightedAverageShares
834 Basic loss per share (€/share) Concept (Share) For Period ifrs-full:BasicEarningsLossPerShare
835 Diluted loss per share (€/share) Concept (Share) For Period ifrs-full:DilutedEarningsLossPerShare
836 100540 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Basic Earnings per Share and Diluted Earnings (Loss) per Share (Parenthetical) (Detail) Network

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837 Implied Table Table

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838 Earnings Per Share [Abstract] Abstract ifrs-full:EarningsPerShareAbstract
839 Number of treasury shares held Concept (Shares) As Of eryp:NumberOfTreasurySharesHeld
840 100550 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Details of Provisions (Detail) Network

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841 Disclosure Of Other Provisions [Table] Table

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842 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
843 Other provisions [member] Member ifrs-full:OtherProvisionsMember
844 Provision for retirement indemnities [member] Member eryp:ProvisionForRetirementIndemnitiesMember
845 Provisions For Other Member eryp:ProvisionsForOtherMember
846 Disclosure Of Other Provisions [Line Items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
847 Long-term provisions Concept (Monetary) As Of Credit ifrs-full:NoncurrentProvisions
848 100560 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Breakdown of Provisions (Detail) Network

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849 Disclosure Of Other Provisions [Table] Table

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850 Classes of other provisions [axis] Axis ifrs-full:ClassesOfProvisionsAxis
851 Other provisions [member] Member ifrs-full:OtherProvisionsMember
852 Provision for retirement indemnities [member] Member eryp:ProvisionForRetirementIndemnitiesMember
853 Provisions for disputes [member] Member eryp:ProvisionsForDisputesMember
854 Disclosure Of Other Provisions [Line Items] LineItems ifrs-full:DisclosureOfOtherProvisionsLineItems
855 Opening Concept (Monetary) As Of Credit ifrs-full:Provisions
856 Other Concept (Monetary) For Period Debit ifrs-full:ActuarialGainsLossesArisingFromChangesInFinancialAssumptionsNetDefinedBenefitLiabilityAsset
857 Provisions Concept (Monetary) For Period Credit ifrs-full:AdditionalProvisionsOtherProvisions
858 Reversals Concept (Monetary) For Period Debit ifrs-full:UnusedProvisionReversedOtherProvisions
859 Closing Concept (Monetary) As Of Credit ifrs-full:Provisions
860 100570 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Estimate of the Retirement Commitments (Detail) Network

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861 Disclosure Of Defined Benefit Plans [Table] Table

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862 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
863 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
864 Non-executive [member] Member eryp:NonexecutiveMember
865 Executive [member] Member eryp:ExecutiveMember
866 Range [axis] Axis ifrs-full:RangeAxis
867 Ranges [member] Member ifrs-full:RangesMember
868 Bottom of range [member] Member ifrs-full:BottomOfRangeMember
869 Top of range [member] Member ifrs-full:TopOfRangeMember
870 Disclosure Of Defined Benefit Plans [Line Items] LineItems ifrs-full:DisclosureOfDefinedBenefitPlansLineItems
871 Discount rate Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfDiscountRates
872 Wage increase Concept (Percent) As Of ifrs-full:ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
873 Social welfare contribution rate Concept (Percent) As Of eryp:ActuarialAssumptionOfSocialWelfareContributionRate
874 Expected staff turnover Concept (Percent) As Of eryp:ActuarialAssumptionOfExpectedStaffTurnover
875 Age of retirement: Concept (Decimal) As Of ifrs-full:ActuarialAssumptionOfRetirementAge
876 Mortality table Concept (Text/String) For Period eryp:MortalityTableDescription
877 100580 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Financial Liabilities by Type (Detail) Network

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878 Implied Table Table

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879 Disclosure Of Financial Liabilities [Abstract] Abstract ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
880 Financial liabilities related to finance leases Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
881 Bank overdrafts Concept (Monetary) As Of Credit eryp:BankOverdraft
882 Conditional advances Concept (Monetary) As Of Credit eryp:ReimbursementOfConditionalAdvance
883 Bank loans Concept (Monetary) As Of Credit ifrs-full:Borrowings
884 Total financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
885 100590 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Financial Liabilities by Maturity (Detail) Network

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886 Disclosure Of Maturity Analysis For Nonderivative Financial Liabilities [Table] Table

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887 Maturity [axis] Axis ifrs-full:MaturityAxis
888 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
889 Less than one year [member] Member ifrs-full:NotLaterThanOneYearMember
890 Later than one year and not later than three years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanThreeYearsMember
891 Later than three years and not later than five years [member] Member ifrs-full:LaterThanThreeYearsAndNotLaterThanFiveYearsMember
892 Later than five years [member] Member ifrs-full:LaterThanFiveYearsMember
893 Disclosure Of Maturity Analysis For Nonderivative Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfMaturityAnalysisForNonderivativeFinancialLiabilitiesLineItems
894 Financial liabilities Abstract ifrs-full:DisclosureOfFinancialLiabilitiesAbstract
895 Bank loans Concept (Monetary) As Of Credit ifrs-full:Borrowings
896 Conditional advances Concept (Monetary) As Of Credit eryp:ReimbursementOfConditionalAdvance
897 Financial liabilities related to finance leases Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
898 Total financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
899 Bank overdrafts Concept (Monetary) As Of Credit eryp:BankOverdrafts1
900 100600 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Main Terms of Agreements (Detail) Network

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901 Disclosure Of Financial Liabilities [Table] Table

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 ifrs-full:DisclosureOfFinancialLiabilitiesTable
902 Types of contracts [axis] Axis ifrs-full:TypesOfContractsAxis
903 Types of contracts [member] Member ifrs-full:TypesOfContractsMember
904 Pancreas project [member] Member eryp:PancreasProjectMember
905 GR-SIL project [member] Member eryp:GRSILProjectMember
906 Tedac project [member] Member eryp:TedacProjectMember
907 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
908 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
909 Bpi France [member] Member eryp:BpiFranceMember
910 Disclosure Of Financial Liabilities [Line Items] LineItems ifrs-full:DisclosureOfFinancialLiabilitiesLineItems
911 At the beginning of the period Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
912 Repayment Concept (Monetary) For Period Credit eryp:RepaymentOfConditionalAdvance
913 Advances received Concept (Monetary) As Of Credit eryp:ConditionalAdvanceGranted
914 Interests Concept (Monetary) For Period ifrs-full:InterestCostsCapitalised
915 At the end of the period Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
916 100610 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Trade and Other Payables (Detail) Network

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917 Trade And Other Payables [Table] Table

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 eryp:TradeAndOtherPayablesTable
918 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
919 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
920 Payables To Domestic Vendors Member eryp:PayablesToDomesticVendorsMember
921 Payables To Foreign Vendors Member eryp:PayablesToForeignVendorsMember
922 Payables To Vendors Accruals Member eryp:PayablesToVendorsAccrualsMember
923 Other Trade Payables Member eryp:OtherTradePayablesMember
924 Trade And Other Payables [Line Items] LineItems eryp:TradeAndOtherPayablesLineItems
925 Vendors Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayables
926 100620 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Other Current Liabilities (Detail) Network

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927 Implied Table Table

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928 Miscellaneous Current Liabilities [Abstract] Abstract ifrs-full:MiscellaneousCurrentLiabilitiesAbstract
929 Social liabilities, taxation and social security Concept (Monetary) As Of Credit ifrs-full:PayablesOnSocialSecurityAndTaxesOtherThanIncomeTax
930 Deferred revenue Concept (Monetary) As Of Credit ifrs-full:DeferredIncomeClassifiedAsCurrent
931 Other payables Concept (Monetary) As Of Credit ifrs-full:OtherCurrentPayables
932 Total other current liabilities Concept (Monetary) As Of Credit ifrs-full:OtherCurrentLiabilities
933 100630 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Transactions Between Related Parties (Detail) Network

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934 Disclosure Of Transactions Between Related Parties [Table] Table

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935 Categories of related parties [axis] Axis ifrs-full:CategoriesOfRelatedPartiesAxis
936 Entity's total for related parties [member] Member ifrs-full:EntitysTotalForRelatedPartiesMember
937 Executive officers / VP and Qualified person [member] Member eryp:ExecutiveOfficersVPAndQualifiedPersonMember
938 Executive committee [member] Member eryp:ExecutiveCommitteeMember
939 Board of directors [member] Member eryp:BoardOfDirectorsMember
940 Disclosure Of Transactions Between Related Parties [Line Items] LineItems ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
941 Salary / Fees Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationShorttermEmployeeBenefits
942 Retirement benefits Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationPostemploymentBenefits
943 Share based payments Concept (Monetary) For Period Debit ifrs-full:KeyManagementPersonnelCompensationSharebasedPayment
944 100640 - Disclosure - Notes Related to the Consolidated Statements of Financial Position - Summary of Financial Instruments Recognized in the Consolidated Statement of Financial Position and Effect on Net Income (Loss) (Detail) Network

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945 Disclosure Of Financial Instruments [Table] Table

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946 Categories of financial assets [axis] Axis ifrs-full:CategoriesOfFinancialAssetsAxis
947 Financial assets, category [member] Member ifrs-full:FinancialAssetsCategoryMember
948 Financial assets at carrying value [member] Member eryp:FinancialAssetsAtCarryingValueMember
949 Financial assets at fair value through profit or loss, category [member] Member ifrs-full:FinancialAssetsAtFairValueThroughProfitOrLossCategoryMember
950 Loans and receivables, category [member] Member ifrs-full:LoansAndReceivablesCategoryMember
951 Financial assets at amortised cost, category [member] Member ifrs-full:FinancialAssetsAtAmortisedCostCategoryMember
952 Financial assets at fair value through other comprehensive income, category [member] Member ifrs-full:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
953 Fair value through other comprehensive income [member] Member eryp:FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeMember
954 Categories of financial liabilities [axis] Axis ifrs-full:CategoriesOfFinancialLiabilitiesAxis
955 Financial liabilities, category [member] Member ifrs-full:FinancialLiabilitiesCategoryMember
956 Financial liabilities at carrying value [member ] Member eryp:FinancialLiabilitiesAtCarryingValueMember
957 Financial liabilities at fair value through profit or loss, category [member] Member ifrs-full:FinancialLiabilitiesAtFairValueThroughProfitOrLossCategoryMember
958 Loans and receivables, category [member] Member ifrs-full:LoansAndReceivablesCategoryMember
959 Financial liabilities at fair value through other comprehensive income. [member] Member eryp:FinancialLiabilitiesAtFairValueThroughOtherComprehensiveIncomeMember
960 Classes of financial liabilities [axis] Axis ifrs-full:ClassesOfFinancialLiabilitiesAxis
961 Financial liabilities, class [member] Member ifrs-full:FinancialLiabilitiesMember
962 Financial liabilities at amortised cost, category [member] Member ifrs-full:FinancialLiabilitiesAtAmortisedCostCategoryMember
963 Financial liabilities at fair value, class [member] Member ifrs-full:FinancialLiabilitiesAtFairValueMember
964 Disclosure Of Financial Instruments [Line Items] LineItems ifrs-full:DisclosureOfFinancialInstrumentsLineItems
965 Non-current financial assets Concept (Monetary) As Of Debit ifrs-full:NoncurrentFinancialAssets
966 Trade and other receivables Concept (Monetary) As Of Debit ifrs-full:TradeAndOtherReceivables
967 Other current assets Concept (Monetary) As Of Debit ifrs-full:OtherCurrentAssets
968 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
969 Total financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
970 Financial liabilities – non-current portion Concept (Monetary) As Of Credit ifrs-full:NoncurrentFinancialLiabilities
971 Financial liabilities – current portion Concept (Monetary) As Of Credit ifrs-full:CurrentFinancialLiabilities
972 Vendors Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayables
973 Total financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
974 Total financial assets Concept (Monetary) As Of Debit ifrs-full:FinancialAssets
975 Total financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
976 100650 - Disclosure - Management of Financial Risks - Additional Information (Detail) Network

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977 Disclosure Of Financial Risk Management [Table] Table

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978 Types of risks [axis] Axis ifrs-full:TypesOfRisksAxis
979 Risks [member] Member ifrs-full:TypesOfRisksMember
980 Liquidity risk [member] Member ifrs-full:LiquidityRiskMember
981 Currency risk [member] Member ifrs-full:CurrencyRiskMember
982 Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis] Axis ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
983 Carrying amount [member] Member ifrs-full:CarryingAmountMember
984 Gross carrying amount [member] Member ifrs-full:GrossCarryingAmountMember
985 Classes of financial instruments [axis] Axis ifrs-full:ClassesOfFinancialInstrumentsAxis
986 Financial instruments, class [member] Member ifrs-full:ClassesOfFinancialInstrumentsMember
987 Contractual Cash Flows [Member] Member eryp:ContractualCashFlowsMember
988 Maturity [axis] Axis ifrs-full:MaturityAxis
989 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
990 Less than one year [member] Member ifrs-full:NotLaterThanOneYearMember
991 Later than one year and not later than five years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
992 Later than five years [member] Member ifrs-full:LaterThanFiveYearsMember
993 Currency Axis us-gaap:CurrencyAxis
994 All Currencies Member currency:AllCurrenciesDomain
995 United States of America, Dollars Member currency:USD
996 Disclosures Of Financial Risk Management [Line Items] LineItems eryp:DisclosuresOfFinancialRiskManagementLineItems
997 Cash flows used by operating activities Concept (Monetary) For Period ifrs-full:CashFlowsFromUsedInOperatingActivities
998 Cash and cash equivalents Concept (Monetary) As Of Debit ifrs-full:CashAndCashEquivalents
999 Bank loans Concept (Monetary) As Of Credit eryp:SecuredBankLoansOutstanding
1000 Conditional advances Concept (Monetary) As Of Credit eryp:ReimbursementOfConditionalAdvance
1001 Financial liabilities related to finance leases Concept (Monetary) As Of Credit ifrs-full:FinanceLeaseLiabilities
1002 Vendors Concept (Monetary) As Of Credit ifrs-full:TradeAndOtherPayables
1003 Total financial liabilities Concept (Monetary) As Of Credit ifrs-full:FinancialLiabilities
1004 Bank overdrafts Concept (Monetary) As Of Credit ifrs-full:BankOverdraftsClassifiedAsCashEquivalents
1005 Percentage of operating expenses denominated in U.S. dollars Concept (Percent) For Period eryp:PercentageOfOperatingExpensesDenominatedInForeignCurrency
1006 Bank account position held in USD Concept (Monetary) As Of Debit ifrs-full:BankDebtInstrumentsHeld
1007 Impact of 1% decrease in change in exchange rate Concept (Monetary) For Period Credit eryp:EffectOfOnePercentDecreaseOfExchangeRateOnImpactOnForeignCurrency
1008 Impact of 5% decrease in change in exchange rate Concept (Monetary) For Period Credit eryp:EffectOfFivePercentDecreaseOfExchangeRateOnImpactOnBankAccountPositionHeldInUsd
1009 Impact of 10% decrease in change in exchange rate Concept (Monetary) For Period Credit eryp:EffectOfTenPercentDecreaseOfExchangeRateOnImpactOnBankAccountPositionHeldInUsd
1010 100660 - Disclosure - Off-Balance Sheet Commitments - Summary of Off-Balance Sheet Commitments Correspond to the Lease of Buildings (Detail) Network

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1011 Disclosure Of Operating Lease [Table] Table

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1012 Maturity [axis] Axis ifrs-full:MaturityAxis
1013 Aggregated time bands [member] Member ifrs-full:AggregatedTimeBandsMember
1014 Less than one year [member] Member ifrs-full:NotLaterThanOneYearMember
1015 Later than one year and not later than five years [member] Member ifrs-full:LaterThanOneYearAndNotLaterThanFiveYearsMember
1016 Later than five years [member] Member ifrs-full:LaterThanFiveYearsMember
1017 Geographical areas [axis] Axis ifrs-full:GeographicalAreasAxis
1018 Geographical areas [member] Member ifrs-full:GeographicalAreasMember
1019 France [member] Member country:FR
1020 United States [member] Member country:US
1021 Disclosure Of Operating Lease [Line Items] LineItems eryp:DisclosureOfOperatingLeaseLineItems
1022 Total lease commitments Concept (Monetary) As Of Credit ifrs-full:LeaseLiabilities
1023 100670 - Disclosure - Off-Balance Sheet Commitments - Additional Information (Detail) Network

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1024 Disclosure Of Off Balance Sheet Commitments [Table] Table

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1025 Counterparties [axis] Axis ifrs-full:CounterpartiesAxis
1026 Counterparties [member] Member ifrs-full:CounterpartiesMember
1027 Orphan Europe Member eryp:OrphanEuropeMember
1028 Disclosure Of Off Balance Sheet Commitments [Line Items] LineItems eryp:DisclosureOfOffBalanceSheetCommitmentsLineItems
1029 Total lease commitments Concept (Monetary) As Of Credit ifrs-full:LeaseLiabilities
1030 Payment received on signing agreement Concept (Monetary) For Period Credit eryp:PaymentReceivedOnSigningAgreement
1031 Future payments upon achievement of specified clinical, regulatory and commercial milestones Concept (Monetary) For Period Debit eryp:FuturePaymentsUponAchievementOfSpecifiedClinicalRegulatoryAndCommercialMilestones
1032 Percentage of payment received for product delivered and royalties on sales Concept (Percent) For Period eryp:PercentageOfPaymentReceivedForProductDeliveredAndRoyaltiesOnSales

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