CannTrust Holdings Inc. (SEC Filing Page | XBRL Cloud Viewer | XBRL Instance)

Line	Label	Object Class	Period Type	Balance	Report ElementName
1	001 - Document - Document And Entity Information	Network	*	*	http://canntrust.ca/role/DocumentAndEntityInformation
2	Implied Table	Table	*	*	implied:Table
3	Document And Entity Information [Abstract]	Abstract			ctst:DocumentAndEntityInformationAbstract
4	Entity Registrant Name	Concept (Text/String)	For Period		dei:EntityRegistrantName
5	Entity Central Index Key	Concept (CIK Number)	For Period		dei:EntityCentralIndexKey
6	Trading Symbol	Concept (Text/String)	For Period		dei:TradingSymbol
7	Entity Current Reporting Status	Concept (Yes/No)	For Period		dei:EntityCurrentReportingStatus
8	Current Fiscal Year End Date	Concept (Month/Day)	For Period		dei:CurrentFiscalYearEndDate
9	Entity Common Stock, Shares Outstanding	Concept (Shares)	As Of		dei:EntityCommonStockSharesOutstanding
10	Document Type	Concept (Submission Type)	For Period		dei:DocumentType
11	Document Period End Date	Concept (Date)	For Period		dei:DocumentPeriodEndDate
12	Amendment Flag	Concept (Yes/No)	For Period		dei:AmendmentFlag
13	Document Fiscal Year Focus	Concept (Year)	For Period		dei:DocumentFiscalYearFocus
14	Document Fiscal Period Focus	Concept (Fiscal Period)	For Period		dei:DocumentFiscalPeriodFocus
15	Entity Emerging Growth Company	Concept (Yes/No)	For Period		dei:EntityEmergingGrowthCompany
16	Entity Ex Transition Period	Concept (Yes/No)	For Period		dei:EntityExTransitionPeriod
17	002 - Statement - Consolidated Statements of Financial Position	Network	*	*	http://canntrust.ca/role/ConsolidatedStatementsOfFinancialPosition
18	Implied Table	Table	*	*	implied:Table
19	Statement of financial position [abstract]	Abstract			ifrs-full:StatementOfFinancialPositionAbstract
20	Assets	Abstract			ifrs-full:AssetsAbstract
21	Current	Abstract			ifrs-full:CurrentAssetsAbstract
22	Cash	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
23	Short term investments	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
24	Harmonized sales tax recoverable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentReceivablesFromTaxesOtherThanIncomeTax
25	Inventory	Concept (Monetary)	As Of	Debit	ifrs-full:InventoriesTotal
26	Biological assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentBiologicalAssets
27	Accounts receivable	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentTradeReceivables
28	Prepaid expenses	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPrepaidExpenses
29	Total current assets	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentAssets
30	Investments	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
31	Restricted cash	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentRestrictedCashAndCashEquivalents
32	Property and equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
33	Financial assets	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
34	Total Assets	Concept (Monetary)	As Of	Debit	ifrs-full:Assets
35	Liabilities	Abstract			ifrs-full:LiabilitiesAbstract
36	Current	Abstract			ifrs-full:CurrentLiabilitiesAbstract
37	Accounts payable and accrued liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:TradeAndOtherCurrentPayables
38	Current portion of promissory note	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentPortionOfLongtermBorrowings
39	Current portion of mortgage	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentSecuredBankLoansReceivedAndCurrentPortionOfNoncurrentSecuredBankLoansReceived
40	Total current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
41	Promissory note	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
42	Mortgage	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPortionOfNoncurrentSecuredBankLoansReceived
43	Deferred tax	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilities
44	Total Liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:Liabilities
45	Shareholders' Equity	Abstract			ifrs-full:EquityAbstract
46	Share capital	Concept (Monetary)	As Of	Credit	ifrs-full:IssuedCapital
47	Share-based payment reserve	Concept (Monetary)	As Of	Credit	ifrs-full:ReserveOfSharebasedPayments
48	Warrants reserve	Concept (Monetary)	As Of	Credit	ctst:WarrantsReserve
49	Deficit	Concept (Monetary)	As Of	Credit	ifrs-full:RetainedEarnings
50	Total Shareholders' Equity	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
51	Total Liabilities and Shareholders' Equity	Concept (Monetary)	As Of	Credit	ifrs-full:EquityAndLiabilities
52	003 - Statement - Consolidated Statements of Net (Loss) Income and Comprehensive (Loss) Income	Network	*	*	http://canntrust.ca/role/Consolidatedstatementsofnetlossincomeandcomprehensivelossincome
53	Implied Table	Table	*	*	implied:Table
54	Profit or loss [abstract]	Abstract			ifrs-full:IncomeStatementAbstract
55	Gross revenue	Concept (Monetary)	For Period	Credit	ctst:GrossRevenue
56	Excise duty	Concept (Monetary)	For Period	Debit	ctst:ExciseDuty
57	Net revenue	Concept (Monetary)	For Period	Credit	ifrs-full:Revenue
58	Cost of goods sold	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
59	Gross profit, before changes in fair value of biological assets	Concept (Monetary)	For Period	Credit	ctst:GrossProfitBeforeTheUnrealizedGainOnChangesInFairValueOfAssets
60	Fair value changes in biological assets included in inventory sold	Concept (Monetary)	For Period	Debit	ctst:FaiValueChangesInBiologicalAssetsIncludedInInventorySold
61	Unrealized gain on changes in fair value of biological assets	Concept (Monetary)	For Period		ifrs-full:GainsLossesOnFairValueAdjustmentBiologicalAssets
62	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
63	Expenses	Abstract			ifrs-full:ExpenseByNatureAbstract
64	Amortization	Concept (Monetary)	For Period	Debit	ifrs-full:DepreciationAndAmortisationExpense
65	General and administrative	Concept (Monetary)	For Period	Debit	ifrs-full:GeneralAndAdministrativeExpense
66	Marketing and promotion	Concept (Monetary)	For Period	Debit	ifrs-full:SalesAndMarketingExpense
67	Salaries and benefits	Concept (Monetary)	For Period	Debit	ifrs-full:WagesAndSalaries
68	Selling and shipping costs	Concept (Monetary)	For Period	Debit	ifrs-full:SellingExpense
69	Share based compensation	Concept (Monetary)	For Period	Debit	ctst:ExpenseFromShareBasedPaymentTransactionsWithEmployeesAndnonemployees
70	Operating expenses	Concept (Monetary)	For Period	Debit	ifrs-full:OperatingExpenseExcludingCostOfSales
71	(Loss) income from operations	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossFromOperatingActivities
72	Mortgage interest expense	Concept (Monetary)	For Period	Debit	ifrs-full:InterestExpense
73	Interest income	Concept (Monetary)	For Period	Credit	ifrs-full:InterestRevenueExpense
74	Accretion expense	Concept (Monetary)	For Period	Debit	ctst:AccretionExpenses
75	Transaction costs	Concept (Monetary)	For Period	Debit	ctst:TransactionCostsRelatedToTheAcquisition
76	Other (loss) income	Concept (Monetary)	For Period	Credit	ifrs-full:OtherGainsLosses
77	(Loss) on equity accounted investment	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
78	Impairment loss on assets	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
79	Loss on revaluation of derivative liability	Concept (Monetary)	For Period	Debit	ifrs-full:LossesOnChangeInFairValueOfDerivatives
80	(Loss) income before income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
81	Deferred income tax expense	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
82	Net (loss) income and comprehensive (loss) income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
83	Weighted average number of common shares - basic (in shares)	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
84	Weighted average number of common shares - diluted (in shares)	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
85	Earnings (loss) per share - basic (in dollars per share)	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
86	Earnings (loss) per share - diluted (in dollars per share)	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
87	004 - Statement - Consolidated Statements of Changes in Shareholders' Equity	Network	*	*	http://canntrust.ca/role/ConsolidatedStatementsOfChangesInShareholdersEquity
88	Statement of changes in equity [table]	Table	*	*	ifrs-full:StatementOfChangesInEquityTable
89	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
90	Equity [member]	Member			ifrs-full:EquityMember
91	Deficit	Member			ifrs-full:RetainedEarningsMember
92	Warrants reserve	Member			ctst:WarrantsReserveMember
93	Share-based payment reserve	Member			ifrs-full:ReserveOfSharebasedPaymentsMember
94	Share Capital	Member			ifrs-full:IssuedCapitalMember
95	Creation date [axis]	Axis			ifrs-full:CreationDateAxis
96	Default financial statements date [member]	Member			ifrs-full:DefaultFinancialStatementsDateMember
97	February 2017	Member			ctst:FebruaryMember
98	November 2017	Member			ctst:NovemberMember
99	Statement of changes in equity [line items]	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
100	Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
101	Balance (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
102	February 2017 Private Placement	Concept (Monetary)	For Period	Credit	ctst:IncreaseThroughIssuanceOfSpecialWarrantsInPrivatePlacementEquity
103	February 2017 Private Placement (in shares)	Concept (Shares)	For Period		ctst:IncreaseThroughCommonSharesIssuedInPrivatePlacementEquity
104	February 2017 Warrants issued as partial consideration for Private Placement	Concept (Monetary)	For Period	Credit	ctst:WarrantsIssuedAsPartialConsiderationForPrivatePlacement
105	Warrant issuance costs	Concept (Monetary)	For Period	Debit	ctst:WarrantIssuanceCosts
106	March 2017 Share issuance on exercise of convertible debt	Concept (Monetary)	For Period	Credit	ctst:AmountOfShareIssuanceOnExerciseOfConvertibleDebt
107	March 2017 Share issuance on exercise of convertible debt (in shares)	Concept (Shares)	For Period		ctst:ShareIssuanceOnExerciseOfConvertibleDebt
108	March 2017 Exercise of warrants	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
109	March 2017 Exercise of warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfWarrantsEquityShares
110	March 2017 Share issuance on exercise of convertible debt due on demand	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughAmountOfShareIssuanceOnExerciseOfConvertibleDebtDueOnDemand
111	March 2017 Share issuance on exercise of convertible debt due on demand (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughShareIssuanceOnExerciseOfConvertibleDebtDueOnDemand
112	March 2017 Share issuance as partial consideration for Warrant Financing	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughAmountOfShareIssuanceAsPartialConsiderationForWarrantFinancing
113	March 2017 Share issuance as partial consideration for Warrant Financing (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughShareIssuanceAsPartialConsiderationForWarrantFinancing
114	April 2017 Share issuance in lieu of services	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughAmountOfShareIssuanceInLieuOfServices
115	April 2017 Share issuance in lieu of services (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughShareIssuanceInLieuOfServices
116	August 2017 Share issuance on automatic conversion of convertible debt	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughConversionOfConvertibleInstruments
117	August 2017 Share issuance on automatic conversion of convertible debt (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughConversionOfConvertibleInstrumentsShares
118	August 2017 Share issuance on automatic conversion of Special Warrants	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughConversionOfAmountOfSpecialWarrants
119	August 2017 Share issuance on automatic conversion of Special Warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughConversionOfSpecialWarrants
120	Exercise of warrants	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughExerciseOfWarrantsValueEquity1
121	Exercise of warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfWarrantsEquityShares1
122	Exercise of stock options	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
123	Exercise of stock options (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfOptionsShares
124	November 30, 2017 Private Placement	Concept (Monetary)	For Period	Credit	ctst:IncreaseThroughIssuanceOfSpecialWarrantsInPrivatePlacementValueEquity1
125	November 30, 2017 Private Placement (in shares)	Concept (Shares)	For Period		ctst:IncreaseThroughCommonSharesIssuedInPrivatePlacementEquity1
126	November 2017 Warrants issued as partial consideration for Private Placement	Concept (Monetary)	For Period	Credit	ctst:Warrantsissuedaspartialconsiderationforprivateplacement1
127	Exercise of warrants	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughExerciseOfWarrantsEquity1
128	Exercise of warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfWarrantsEquityShares2
129	Exercise of broker warrants	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughExerciseOfBrokerWarrantsAmount
130	Exercise of broker warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfBrokerWarrants
131	Units issued in bought deal	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
132	Units issued in bought deal (in shares)	Concept (Shares)	For Period		ctst:AmountOfIssueOfEquity
133	Share-based compensation	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughSharebasedPaymentTransactions
134	Net (loss) income and comprehensive (loss) income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
135	Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
136	Balance (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesOutstanding
137	005 - Statement - Condensed Interim Consolidated Statements of Cash Flows	Network	*	*	http://canntrust.ca/role/CondensedInterimConsolidatedStatementsOfCashFlows
138	Implied Table	Table	*	*	implied:Table
139	Statement of cash flows [abstract]	Abstract			ifrs-full:StatementOfCashFlowsAbstract
140	Operating Activities	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
141	Net (loss) income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
142	Items not effecting cash	Abstract			ifrs-full:AdjustmentsForReconcileProfitLossAbstract
143	Amortization	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDepreciationAndAmortisationExpense
144	Accretion expense	Concept (Monetary)	For Period	Debit	ctst:AdjustmentsForAccretionExpense
145	Biological assets fair value adjustment expensed to cost of sales	Concept (Monetary)	For Period	Debit	ctst:AdjustmentsForBiologicalAssetsExpensedToCostOfSales
146	Unrealized gain on changes in fair value of biological assets	Concept (Monetary)	For Period	Credit	ctst:AdjustmentsForUnrealizedGainLossOnChangeInFairValueOfBiologicalAssets
147	Loss on equity accounted investment	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAccountedForUsingEquityMethod
148	Loss on revaluation of investment	Concept (Monetary)	For Period	Debit	ctst:IncreaseDecreaseRevaluationOfInvestment
149	Loss on revaluation of derivative liability	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInDerivativeFinancialLiabilities
150	Interest (income) expense, net of interest income	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForInterestExpense
151	Expenses settled with inventory	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInInventories
152	Expenses settled with issuance of common shares	Concept (Monetary)	For Period	Debit	ctst:AdjustmentsForExpensesSettledWithIssuanceOfCommonShares
153	Deferred income taxes	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDeferredTaxExpense
154	Share-based compensation	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForSharebasedPayments
155	Cash flows from used in operations before changes in working capital	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperationsBeforeChangesInWorkingCapital
156	Changes in non-cash working capital	Abstract			ctst:ChangesInNon-CashWorkingCapitalAbstract
157	Harmonized sales tax recoverable	Concept (Monetary)	For Period	Debit	ctst:AdjustmentsForDecreaseIncreaseInSalesTaxReceivable
158	Inventory and biological assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInBiologicalAssets
159	Accounts receivable	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInTradeAccountReceivable
160	Prepaid expenses	Concept (Monetary)	For Period	Debit	ctst:AdjustmentsForDecreaseIncreaseInPrepaids
161	Accounts payable and accrued liabilities	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForIncreaseDecreaseInTradeAndOtherPayables
162	Cash flows used in operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
163	Investing Activities	Abstract			ifrs-full:CashFlowsFromUsedInInvestingActivitiesAbstract
164	Purchase of property and equipment	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
165	Disposal of property and equipment	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromSalesOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities
166	Acquisition of Greenhouse and related assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfOtherLongtermAssetsClassifiedAsInvestingActivities
167	Interest received	Concept (Monetary)	For Period	Debit	ifrs-full:InterestReceivedClassifiedAsInvestingActivities
168	Purchase of investments and financial assets	Concept (Monetary)	For Period	Credit	ifrs-full:PurchaseOfInvestmentProperty
169	Purchase of short term investments	Concept (Monetary)	For Period	Credit	ctst:PurchaseOfShortTermInvestmentsClassifiedAsInvestingActivities
170	Redemption of short term investments	Concept (Monetary)	For Period	Debit	ctst:RedemptionOfShortTermInvestmentsClassifiedAsInvestingActivities
171	Cash flows used in investing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInInvestingActivities
172	Financing Activities	Abstract			ifrs-full:CashFlowsFromUsedInFinancingActivitiesAbstract
173	Proceeds from warrant private placement, net of issue costs	Concept (Monetary)	For Period	Debit	ctst:ProceedsFromWarrantPrivatePlacementNetOfIssueCosts
174	Proceeds from exercise of warrants	Concept (Monetary)	For Period	Debit	ctst:ProceedsFromExerciseOfWarrants
175	Proceeds from exercise of stock options	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromExerciseOfOptions
176	Proceeds from mortgage, net of costs	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromNoncurrentBorrowings
177	Proceeds from share issuance, net of costs	Concept (Monetary)	For Period	Debit	ctst:ProceedsFromShareIssuanceNetOfCosts
178	Repayment of mortgage	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfNoncurrentBorrowings
179	Repayment of promissory note	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfCurrentBorrowings
180	Interest paid	Concept (Monetary)	For Period	Credit	ifrs-full:InterestPaidClassifiedAsFinancingActivities
181	Restricted cash held as collateral on credit card financing	Concept (Monetary)	For Period	Debit	ifrs-full:OtherInflowsOutflowsOfCashClassifiedAsFinancingActivities
182	Cash flows provided by financing activities	Concept (Monetary)	For Period	Debit	ifrs-full:CashFlowsFromUsedInFinancingActivities
183	Net (decrease) increase in cash	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInCashAndCashEquivalents
184	Cash, at beginning of period	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
185	Cash, at end of period	Concept (Monetary)	As Of	Debit	ifrs-full:CashAndCashEquivalents
186	006 - Disclosure - NATURE OF OPERATIONS	Network	*	*	http://canntrust.ca/role/NatureOfOperations
187	Implied Table	Table	*	*	implied:Table
188	Description Of Business Description [Abstract]	Abstract			ctst:DescriptionOfBusinessDescriptionAbstract
189	NATURE OF OPERATIONS	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfNatureOfOperationsExplanatoryTextBlock
190	007 - Disclosure - BASIS OF PRESENTATION	Network	*	*	http://canntrust.ca/role/BasisOfPresentation
191	Implied Table	Table	*	*	implied:Table
192	Disclosure Of Basis Of Presentation [Abstract]	Abstract			ctst:DisclosureOfBasisOfPresentationAbstract
193	BASIS OF PRESENTATION	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBasisOfPreparationOfFinancialStatementsExplanatory
194	008 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Network	*	*	http://canntrust.ca/role/SummaryOfSignificantAccountingPolicies
195	Implied Table	Table	*	*	implied:Table
196	Disclosure Of Significant Accounting Policies [Abstract]	Abstract			ctst:DisclosureOfSignificantAccountingPoliciesAbstract
197	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfSummaryOfSignificantAccountingPoliciesExplanatory
198	009 - Disclosure - SIGNIFICANT ACCOUNTING ESTIMATES AND JUDGMENTS	Network	*	*	http://canntrust.ca/role/SignificantAccountingEstimatesAndJudgments
199	Implied Table	Table	*	*	implied:Table
200	Disclosure Of Accounting Judgements And Estimates [Abstract]	Abstract			ctst:DisclosureOfAccountingJudgementsAndEstimatesAbstract
201	SIGNIFICANT ACCOUNTING ESTIMATES AND JUDGMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfAccountingJudgementsAndEstimatesExplanatory
202	010 - Disclosure - CHANGE IN ACCOUNTING POLICY	Network	*	*	http://canntrust.ca/role/ChangeInAccountingPolicy
203	Implied Table	Table	*	*	implied:Table
204	Disclosure of changes in accounting estimates [abstract]	Abstract			ifrs-full:DisclosureOfChangesInAccountingEstimatesAbstract
205	CHANGE IN ACCOUNTING POLICY	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfChangesInAccountingPoliciesExplanatory
206	011 - Disclosure - ACQUISITION	Network	*	*	http://canntrust.ca/role/Acquisition
207	Implied Table	Table	*	*	implied:Table
208	Acquisition-date fair value of total consideration transferred [abstract]	Abstract			ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract
209	ACQUISITION	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfAcquisitionExplanatoryTextBlock
210	012 - Disclosure - RESTRICTED CASH AND SHORT-TERM INVESTMENTS	Network	*	*	http://canntrust.ca/role/RestrictedCashAndShortTermInvestments
211	Implied Table	Table	*	*	implied:Table
212	Restricted Cash And Short Term Investments [Abstract]	Abstract			ctst:RestrictedCashAndShortTermInvestmentsAbstract
213	RESTRICTED CASH AND SHORT-TERM INVESTMENTS	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfRestrictedCashAndShortTermInvestmentsExplanatoryTextBlock
214	013 - Disclosure - INVENTORY AND BIOLOGICAL ASSETS	Network	*	*	http://canntrust.ca/role/InventoryAndBiologicalAssets
215	Implied Table	Table	*	*	implied:Table
216	Disclosure of reconciliation of changes in biological assets [abstract]	Abstract			ifrs-full:DisclosureOfReconciliationOfChangesInBiologicalAssetsAbstract
217	INVENTORY AND BIOLOGICAL ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBiologicalAssetsExplanatory
218	014 - Disclosure - PROPERTY AND EQUIPMENT	Network	*	*	http://canntrust.ca/role/PropertyAndEquipment
219	Implied Table	Table	*	*	implied:Table
220	Disclosure of detailed information about property, plant and equipment [abstract]	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
221	PROPERTY AND EQUIPMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfPropertyPlantAndEquipmentExplanatory
222	015 - Disclosure - IMPAIRMENT	Network	*	*	http://canntrust.ca/role/Impairment
223	Implied Table	Table	*	*	implied:Table
224	Disclosure of impairment loss and reversal of impairment loss [abstract]	Abstract			ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract
225	IMPAIRMENT	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfImpairmentOfAssetsExplanatory
226	016 - Disclosure - FINANCIAL ASSETS	Network	*	*	http://canntrust.ca/role/FinancialAssets
227	Implied Table	Table	*	*	implied:Table
228	Disclosure of financial assets [abstract]	Abstract			ifrs-full:DisclosureOfFinancialAssetsAbstract
229	FINANCIAL ASSETS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialAssetsExplanatory
230	017 - Disclosure - MORTGAGE	Network	*	*	http://canntrust.ca/role/Mortgage
231	Implied Table	Table	*	*	implied:Table
232	Disclosure of detailed information about borrowings [abstract]	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
233	MORTGAGE	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfBorrowingsExplanatory
234	018 - Disclosure - SHARE CAPITAL	Network	*	*	http://canntrust.ca/role/ShareCapital
235	Implied Table	Table	*	*	implied:Table
236	Disclosure of classes of share capital [abstract]	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
237	SHARE CAPITAL	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfClassesOfShareCapitalExplanatory
238	019 - Disclosure - STOCK OPTION PLAN	Network	*	*	http://canntrust.ca/role/StockOptionPlan
239	Implied Table	Table	*	*	implied:Table
240	Disclosure of terms and conditions of share-based payment arrangement [abstract]	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
241	STOCK OPTION PLAN	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementExplanatory
242	020 - Disclosure - RESERVE FOR WARRANTS	Network	*	*	http://canntrust.ca/role/ReserveForWarrants
243	Implied Table	Table	*	*	implied:Table
244	Disclosure Of Reserves Within Warrants [Abstract]	Abstract			ctst:DisclosureOfReservesWithinWarrantsAbstract
245	RESERVE FOR WARRANTS	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfReservesWithinWarrantsTextBlock
246	021 - Disclosure - COMMITMENTS	Network	*	*	http://canntrust.ca/role/Commitments
247	Implied Table	Table	*	*	implied:Table
248	Commitments [Abstract]	Abstract			ctst:CommitmentsAbstract
249	COMMITMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfCommitmentsExplanatory
250	022 - Disclosure - RELATED PARTY TRANSACTIONS	Network	*	*	http://canntrust.ca/role/RelatedPartyTransactions
251	Implied Table	Table	*	*	implied:Table
252	Related party transactions [abstract]	Abstract			ifrs-full:RelatedPartyTransactionsAbstract
253	RELATED PARTY TRANSACTIONS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesExplanatory
254	023 - Disclosure - INVESTMENTS	Network	*	*	http://canntrust.ca/role/Investments
255	Implied Table	Table	*	*	implied:Table
256	Investments in subsidiaries, joint ventures and associates [abstract]	Abstract			ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociatesAbstract
257	INVESTMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfInvestmentsAccountedForUsingEquityMethodExplanatory
258	024 - Disclosure - INCOME TAXES	Network	*	*	http://canntrust.ca/role/IncomeTaxes
259	Implied Table	Table	*	*	implied:Table
260	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
261	INCOME TAXES	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfIncomeTaxExplanatory
262	025 - Disclosure - FINANCIAL INSTRUMENTS	Network	*	*	http://canntrust.ca/role/FinancialInstruments
263	Implied Table	Table	*	*	implied:Table
264	Disclosure of detailed information about financial instruments [abstract]	Abstract			ifrs-full:DisclosureOfFinancialInstrumentsAbstract
265	FINANCIAL INSTRUMENTS	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfFinancialInstrumentsExplanatory
266	026 - Disclosure - CAPITAL MANAGEMENT	Network	*	*	http://canntrust.ca/role/CapitalManagement
267	Implied Table	Table	*	*	implied:Table
268	Capital Management [Abstract]	Abstract			ctst:CapitalManagementAbstract
269	CAPITAL MANAGEMENT	Concept (Text Block (HTML))	For Period		ctst:CapitalManagementDisclosuresTextBlock
270	027 - Disclosure - REVENUE	Network	*	*	http://canntrust.ca/role/Revenue
271	Implied Table	Table	*	*	implied:Table
272	Revenue [abstract]	Abstract			ifrs-full:RevenueAbstract
273	REVENUE	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRevenueExplanatory
274	028 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Network	*	*	http://canntrust.ca/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies
275	Implied Table	Table	*	*	implied:Table
276	Disclosure Of Significant Accounting Policies [Abstract]	Abstract			ctst:DisclosureOfSignificantAccountingPoliciesAbstract
277	Cash	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRestrictedCashAndCashEquivalentsExplanatory
278	Short-term investments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForAvailableforsaleFinancialAssetsExplanatory
279	Property and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForPropertyPlantAndEquipmentExplanatory
280	Impairment of Property and Equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForImpairmentOfAssetsExplanatory
281	Intangible Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIntangibleAssetsAndGoodwillExplanatory
282	Investment in Joint Venture	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForInvestmentsInJointVentures
283	Business Combinations	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBusinessCombinationsExplanatory
284	Leases	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForLeasesExplanatory
285	Revenue Recognition	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForRecognitionOfRevenue
286	Biological Assets	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForBiologicalAssetsExplanatory
287	Inventory	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForMeasuringInventories
288	Share Capital	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIssuedCapitalExplanatory
289	Share Issuance Costs	Concept (Text Block (HTML))	For Period		ctst:DescriptionOfAccountingPolicyForShareIssuanceCostsPolicyTextBlock
290	Research and Development	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForResearchAndDevelopmentExpenseExplanatory
291	Income Taxes	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForIncomeTaxExplanatory
292	Share-based Payments for Non-employees	Concept (Text Block (HTML))	For Period		ctst:DescriptionOfAccountingPolicyForShareBasedPaymentForNonEmployeesTransactionsExplanatoryPolicyTextBlock
293	Share-based Compensation - Employees	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSharebasedPaymentTransactionsExplanatory
294	Earning/Loss per Share	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForEarningsPerShareExplanatory
295	Financial Instruments	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForFinancialInstrumentsExplanatory
296	Related Party Transactions	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForTransactionsWithRelatedPartiesExplanatory
297	Segment Reporting	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfAccountingPolicyForSegmentReportingExplanatory
298	New Standards Adopted in Current Year	Concept (Text Block (HTML))	For Period		ctst:DescriptionOfAccountingPolicyForNewStandardsAdoptedInCurrentYearPolicyTextBlock
299	New Accounting Standards to be Adopted in the Future	Concept (Text Block (HTML))	For Period		ctst:DescriptionOfAccountingPolicyForNewAccountingStandardsToBeAdoptedInTheFuturePolicyTextBlock
300	029 - Disclosure - BASIS OF PRESENTATION (Tables)	Network	*	*	http://canntrust.ca/role/BASISOFPRESENTATIONTables
301	Implied Table	Table	*	*	implied:Table
302	Disclosure Of Basis Of Presentation [Abstract]	Abstract			ctst:DisclosureOfBasisOfPresentationAbstract
303	Schedule of consolidated financial statements include the accounts of the company and its controlled subsidiaries	Concept (Text Block (HTML))	For Period		ctst:ScheduleOfConsolidatedFinancialStatementsIncludeTheAccountsOfTheCompanyAndItsControlledSubsidiariesTableTextBlock
304	030 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	Network	*	*	http://canntrust.ca/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESTables
305	Implied Table	Table	*	*	implied:Table
306	Disclosure Of Significant Accounting Policies [Abstract]	Abstract			ctst:DisclosureOfSignificantAccountingPoliciesAbstract
307	Schedule of useful lives of property, plant and equipment	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfDetailedInformationAboutUsefulLifeOfTangibleAssetsExplanatoryTableTextBlock
308	031 - Disclosure - CHANGE IN ACCOUNTING POLICY (Tables)	Network	*	*	http://canntrust.ca/role/CHANGEINACCOUNTINGPOLICYTables
309	Implied Table	Table	*	*	implied:Table
310	Disclosure of changes in accounting estimates [abstract]	Abstract			ifrs-full:DisclosureOfChangesInAccountingEstimatesAbstract
311	Schedule of impact of the change in accounting policy	Concept (Text Block (HTML))	For Period		ifrs-full:DescriptionOfNatureAndAmountOfChangeInAccountingEstimate
312	032 - Disclosure - ACQUISITION (Tables)	Network	*	*	http://canntrust.ca/role/ACQUISITIONTables
313	Implied Table	Table	*	*	implied:Table
314	Acquisition-date fair value of total consideration transferred [abstract]	Abstract			ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract
315	Schedule of allocated purchase price	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBusinessCombinationsExplanatory
316	Schedule of consideration of the acquisition.	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfDetailedInformationAboutConsiderationOfTheAcquisitionTableTextBlock
317	Schedule of continuity of the promissory note	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfDetailedInformationAboutPromissoryNoteTableTextBlock
318	033 - Disclosure - RESTRICTED CASH AND SHORT-TERM INVESTMENTS (Tables)	Network	*	*	http://canntrust.ca/role/RESTRICTEDCASHANDSHORTTERMINVESTMENTSTables
319	Implied Table	Table	*	*	implied:Table
320	Restricted Cash And Short Term Investments [Abstract]	Abstract			ctst:RestrictedCashAndShortTermInvestmentsAbstract
321	Schedule of restricted cash and short term investments.	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfDetailedInformationAboutRestrictedCashAndShortTermInvestmentsExplanatoryTableTextBlock
322	034 - Disclosure - INVENTORY AND BIOLOGICAL ASSETS (Tables)	Network	*	*	http://canntrust.ca/role/INVENTORYANDBIOLOGICALASSETSTables
323	Implied Table	Table	*	*	implied:Table
324	Disclosure of reconciliation of changes in biological assets [abstract]	Abstract			ifrs-full:DisclosureOfReconciliationOfChangesInBiologicalAssetsAbstract
325	Schedule of biological assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfReconciliationOfChangesInBiologicalAssetsExplanatory
326	Schedule of reallocation of cost	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfReallocationOfCostExplanatoryTableTextBlock
327	Schedule of inventories.	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfDetailedInformationAboutInventoriesExplanatory.TableTextBlock
328	035 - Disclosure - PROPERTY AND EQUIPMENT (Tables)	Network	*	*	http://canntrust.ca/role/PROPERTYANDEQUIPMENTTables
329	Implied Table	Table	*	*	implied:Table
330	Disclosure of detailed information about property, plant and equipment [abstract]	Abstract			ifrs-full:DisclosureOfPropertyPlantAndEquipmentAbstract
331	Schedule of property, plant and equipment	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutPropertyPlantAndEquipmentExplanatory
332	036 - Disclosure - FINANCIAL ASSETS (Tables)	Network	*	*	http://canntrust.ca/role/FINANCIALASSETSTables
333	Implied Table	Table	*	*	implied:Table
334	Disclosure of financial assets [abstract]	Abstract			ifrs-full:DisclosureOfFinancialAssetsAbstract
335	Schedule of financial assets	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutFinancialInstrumentsExplanatory
336	037 - Disclosure - MORTGAGE (Tables)	Network	*	*	http://canntrust.ca/role/MORTGAGETables
337	Implied Table	Table	*	*	implied:Table
338	Disclosure of detailed information about borrowings [abstract]	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsAbstract
339	Schedule of mortgage payable	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsExplanatory
340	038 - Disclosure - SHARE CAPITAL (Tables)	Network	*	*	http://canntrust.ca/role/SHARECAPITALTables
341	Implied Table	Table	*	*	implied:Table
342	Disclosure of classes of share capital [abstract]	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
343	Schedule of share capital	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfDetailedInformationAboutShareCapitalExplanatoryTableTextBlock
344	Schedule of earnings per share	Concept (Text Block (HTML))	For Period		ifrs-full:EarningsPerShareExplanatory
345	039 - Disclosure - STOCK OPTION PLAN (Tables)	Network	*	*	http://canntrust.ca/role/STOCKOPTIONPLANTables
346	Implied Table	Table	*	*	implied:Table
347	Disclosure of terms and conditions of share-based payment arrangement [abstract]	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
348	Schedule of change in ESOP options	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfShareBasedCompensationStockOptionsActivitylExplanatoryTableTextBlock
349	Schedule of outstanding stock options	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfRangeOfExercisePricesOfOutstandingShareOptionsExplanatory
350	Schedule of assumptions use to fair value of options granted	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesExplanatoryTableTextBlock
351	040 - Disclosure - RESERVE FOR WARRANTS (Tables)	Network	*	*	http://canntrust.ca/role/RESERVEFORWARRANTSTables
352	Implied Table	Table	*	*	implied:Table
353	Disclosure Of Reserves Within Warrants [Abstract]	Abstract			ctst:DisclosureOfReservesWithinWarrantsAbstract
354	Schedule of continuity of warrants	Concept (Text Block (HTML))	For Period		ctst:ScheduleOfContinuityOfWarrantsTableTextBlock
355	041 - Disclosure - COMMITMENTS (Tables)	Network	*	*	http://canntrust.ca/role/CommitmentsTables
356	Implied Table	Table	*	*	implied:Table
357	Commitments [Abstract]	Abstract			ctst:CommitmentsAbstract
358	Schedule of commitments	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfMaturityAnalysisOfOperatingLeasePaymentsExplanatory
359	042 - Disclosure - INVESTMENTS (Tables)	Network	*	*	http://canntrust.ca/role/INVESTMENTSTables
360	Implied Table	Table	*	*	implied:Table
361	Investments in subsidiaries, joint ventures and associates [abstract]	Abstract			ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociatesAbstract
362	Schedule of investments	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfInvestmentExplanatoryTableTextBlock
363	043 - Disclosure - INCOME TAXES (Tables)	Network	*	*	http://canntrust.ca/role/INCOMETAXESTables
364	Implied Table	Table	*	*	implied:Table
365	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
366	Schedule of components of income tax provision	Concept (Text Block (HTML))	For Period		ctst:DisclosureOfTaxProvisionRecoveryExplanatoryTableTextBlock
367	Schedule of statutory income tax rate	Concept (Text Block (HTML))	For Period		ctst:ReconciliationOfStatutoryIncomeTaxRateToEffectiveTaxRateExplanatoryTableTextBlock
368	Schedule of components of deferred tax	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDeferredTaxesExplanatory
369	Schedule of temporary differences	Concept (Text Block (HTML))	For Period		ctst:DisclosureTemporaryDifferencesInDeferredTaxAssetsExplanatoryTableTextBlock
370	044 - Disclosure - FINANCIAL INSTRUMENTS (Tables)	Network	*	*	http://canntrust.ca/role/FINANCIALINSTRUMENTSTables
371	Implied Table	Table	*	*	implied:Table
372	Disclosure of detailed information about financial instruments [abstract]	Abstract			ifrs-full:DisclosureOfFinancialInstrumentsAbstract
373	Schedule of contractual maturities	Concept (Text Block (HTML))	For Period		ctst:ScheduleOfContractualMaturitiesunDiscountedCashFlowsTextBlock
374	Schedule of carrying value and fair value of mortgage	Concept (Text Block (HTML))	For Period		ctst:ScheduleOfCarryingValueAndFairValueOfMortgage
375	Schedule of significant unobservable inputs fair value measurement of level 3 financial instruments	Concept (Text Block (HTML))	For Period		ctst:SignificantUnobservableInputsFairValueMeasurementOfLevel3FinancialInstruments
376	045 - Disclosure - REVENUE (Tables)	Network	*	*	http://canntrust.ca/role/RevenueTables
377	Implied Table	Table	*	*	implied:Table
378	Revenue [abstract]	Abstract			ifrs-full:RevenueAbstract
379	Schedule of disaggregates revenue	Concept (Text Block (HTML))	For Period		ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersExplanatory
380	046 - Disclosure - NATURE OF OPERATIONS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/NATUREOFOPERATIONSDetails
381	Description Of Nature Of Operations [Table]	Table	*	*	ctst:DescriptionOfNatureOfOperationsTable
382	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
383	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
384	Cannabis Coffee and Tea Pod Company Ltd.	Member			ctst:CannabisCoffeeAndTeaPodCompanyLimitedMember
385	O'Cannabis	Member			ctst:OCannabisMember
386	Greytrust Inc.	Member			ctst:GreytrustIncMember
387	Description Of Nature Of Operations [Line Items]	LineItems			ctst:DescriptionOfNatureOfOperationsLineItems
388	Percentage of outstanding shares	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
389	047 - Disclosure - BASIS OF PRESENTATION (Details)	Network	*	*	http://canntrust.ca/role/BASISOFPRESENTATIONDetails
390	Disclosure of information about consolidated structured entities [table]	Table	*	*	ifrs-full:DisclosureOfInformationAboutConsolidatedStructuredEntitiesTable
391	Joint ventures [axis]	Axis			ifrs-full:JointVenturesAxis
392	Joint ventures [member]	Member			ifrs-full:JointVenturesMember
393	Cannabis Coffee and Tea Pod Company Ltd.	Member			ctst:CannabisCoffeeAndTeaPodCompanyLimitedMember
394	O'Cannabis	Member			ctst:OCannabisMember
395	Cannatrek Ltd.	Member			ctst:CannatrekLtdMember
396	Stenocare A/S	Member			ctst:StenocareASMember
397	Grey Wolf Animal Health	Member			ctst:GreyWolfAnimalHealthMember
398	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
399	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
400	CannTrust Inc.	Member			ctst:CanntrustIncMember
401	Elmcliffe Investments Inc.	Member			ctst:ElmcliffeInvestmentsIncMember
402	Elmcliffe Investments [No. 2] Inc.	Member			ctst:ElmcliffeInvestmentsNo.2IncMember
403	Greytrust Inc.	Member			ctst:GreytrustIncMember
404	Disclosure of information about consolidated structured entities [line items]	LineItems			ifrs-full:DisclosureOfInformationAboutConsolidatedStructuredEntitiesLineItems
405	Proportion of ownership interest in subsidiary	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInSubsidiary
406	Proportion of ownership interest in joint venture and investment	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
407	048 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)	Network	*	*	http://canntrust.ca/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESDetails
408	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
409	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
410	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
411	Greenhouse and Improvements	Member			ctst:GreenhouseAndImprovementsMember
412	Buildings	Member			ifrs-full:BuildingsMember
413	Leasehold improvements	Member			ifrs-full:LeaseholdImprovementsMember
414	Production Equipment	Member			ifrs-full:MachineryMember
415	Furniture and fixtures	Member			ifrs-full:FixturesAndFittingsMember
416	Vehicles	Member			ifrs-full:VehiclesMember
417	Computer equipment	Member			ifrs-full:ComputerEquipmentMember
418	Computer software	Member			ifrs-full:ComputerSoftwareMember
419	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
420	Amortization method	Concept (Text/String)	For Period		ifrs-full:DepreciationMethodPropertyPlantAndEquipment
421	Useful life	Concept (Text/String)	For Period		ifrs-full:UsefulLivesOrDepreciationRatesPropertyPlantAndEquipment
422	049 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Detail Textuals)	Network	*	*	http://canntrust.ca/role/SUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESDetails1
423	Disclosure of quantitative information about right-of-use assets [table]	Table	*	*	ifrs-full:DisclosureOfQuantitativeInformationAboutRightofuseAssetsTable
424	Property, plant and equipment by operating lease status [axis]	Axis			ifrs-full:PropertyPlantAndEquipmentByOperatingLeaseStatusAxis
425	Property, plant and equipment by operating lease status [member]	Member			ifrs-full:PropertyPlantAndEquipmentByOperatingLeaseStatusMember
426	Property, plant and equipment subject to operating leases	Member			ifrs-full:PropertyPlantAndEquipmentSubjectToOperatingLeasesMember
427	Range [axis]	Axis			ifrs-full:RangeAxis
428	Ranges [member]	Member			ifrs-full:RangesMember
429	Minimum	Member			ifrs-full:BottomOfRangeMember
430	Maximum	Member			ifrs-full:TopOfRangeMember
431	Disclosure of quantitative information about right-of-use assets [line items]	LineItems			ifrs-full:DisclosureOfQuantitativeInformationAboutRightofuseAssetsLineItems
432	Right of use assets and lease liabilities	Concept (Monetary)	As Of	Debit	ifrs-full:RightofuseAssets
433	Committed future lease	Concept (Monetary)	As Of	Debit	ctst:CommittedFutureLease
434	050 - Disclosure - SIGNIFICANT ACCOUNTING ESTIMATES AND JUDGMENTS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/SIGNIFICANTACCOUNTINGESTIMATESANDJUDGMENTSDetails1
435	Implied Table	Table	*	*	implied:Table
436	Disclosure Of Accounting Judgements And Estimates [Abstract]	Abstract			ctst:DisclosureOfAccountingJudgementsAndEstimatesAbstract
437	Finite-lived intangible assets, amortization method	Concept (Text/String)	For Period		ctst:FiniteIntangibleAssetsAmortizationMethod
438	051 - Disclosure - CHANGE IN ACCOUNTING POLICY (Details)	Network	*	*	http://canntrust.ca/role/CHANGEINACCOUNTINGPOLICYDetails
439	Disclosure of voluntary change in accounting policy [table]	Table	*	*	ifrs-full:DisclosureOfVoluntaryChangeInAccountingPolicyTable
440	Voluntary changes in accounting policy [axis]	Axis			ifrs-full:VoluntaryChangesInAccountingPolicyAxis
441	Voluntary changes in accounting policy [member]	Member			ifrs-full:VoluntaryChangesInAccountingPolicyMember
442	New policy	Member			ctst:NewPolicyMember
443	Original policy	Member			ctst:OriginalPolicyMember
444	Impact of change	Member			ctst:ImpactOfChangeInPolicyMember
445	Disclosure of voluntary change in accounting policy [line items]	LineItems			ifrs-full:DisclosureOfVoluntaryChangeInAccountingPolicyLineItems
446	Profit or loss [abstract]	Abstract			ifrs-full:IncomeStatementAbstract
447	Cost of goods sold	Concept (Monetary)	For Period	Debit	ifrs-full:CostOfSales
448	Amortization expensed to cost of sales	Concept (Monetary)	For Period	Debit	ctst:AmortizationExpensToCostOfSales
449	Gross profit, before the unrealized gain on changes in fair value of biological assets	Concept (Monetary)	For Period	Credit	ctst:GrossProfitBeforeTheUnrealizedGainOnChangesInFairValueOfAssets
450	Fair value changes in biological assets included in inventory sold	Concept (Monetary)	For Period	Debit	ctst:FaiValueChangesInBiologicalAssetsIncludedInInventorySold
451	Unrealized gain on changes in fair value of biological assets	Concept (Monetary)	For Period		ifrs-full:GainsLossesOnFairValueAdjustmentBiologicalAssets
452	Gross profit	Concept (Monetary)	For Period	Credit	ifrs-full:GrossProfit
453	052 - Disclosure - CHANGE IN ACCOUNTING POLICY (Details 1)	Network	*	*	http://canntrust.ca/role/CHANGEINACCOUNTINGPOLICYDetails1
454	Disclosure of voluntary change in accounting policy [table]	Table	*	*	ifrs-full:DisclosureOfVoluntaryChangeInAccountingPolicyTable
455	Voluntary changes in accounting policy [axis]	Axis			ifrs-full:VoluntaryChangesInAccountingPolicyAxis
456	Voluntary changes in accounting policy [member]	Member			ifrs-full:VoluntaryChangesInAccountingPolicyMember
457	New policy	Member			ctst:NewPolicyMember
458	Original policy	Member			ctst:OriginalPolicyMember
459	Impact of change	Member			ctst:ImpactOfChangeInPolicyMember
460	Disclosure of voluntary change in accounting policy [line items]	LineItems			ifrs-full:DisclosureOfVoluntaryChangeInAccountingPolicyLineItems
461	Cash flows from (used in) operating activities [abstract]	Abstract			ifrs-full:CashFlowsFromUsedInOperatingActivitiesAbstract
462	Biological assets expensed to cost of sales	Concept (Monetary)	For Period	Debit	ctst:AdjustmentsForBiologicalAssetsExpensedToCostOfSales
463	Unrealized gain on changes in fair value of biological assets	Concept (Monetary)	For Period	Credit	ctst:AdjustmentsForUnrealizedGainLossOnChangeInFairValueOfBiologicalAssets
464	Changes in non-working capital Inventory and biological assets	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDecreaseIncreaseInBiologicalAssets
465	Cash flow used in operating activities	Concept (Monetary)	For Period		ifrs-full:CashFlowsFromUsedInOperatingActivities
466	053 - Disclosure - ACQUISITION (Details)	Network	*	*	http://canntrust.ca/role/ACQUISITIONDetails
467	Disclosure of subsidiaries [table]	Table	*	*	ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesTable
468	Subsidiaries [axis]	Axis			ifrs-full:SignificantInvestmentsInSubsidiariesAxis
469	Entity's total for subsidiaries [member]	Member			ifrs-full:EntitysTotalForSubsidiariesMember
470	Elmcliffe Investments Inc.	Member			srt:SubsidiariesMember
471	Disclosure of subsidiaries [line items]	LineItems			ifrs-full:DisclosureOfSignificantInvestmentsInSubsidiariesLineItems
472	Assets	Abstract			ifrs-full:AssetsAbstract
473	Land	Concept (Monetary)	As Of	Debit	ifrs-full:Land
474	Residential Buildings	Concept (Monetary)	As Of	Debit	ifrs-full:Buildings
475	Greenhouses and Equipment	Concept (Monetary)	As Of	Debit	ctst:GreenhousesAndEquipment
476	Plant and Equipment	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
477	Vehicles	Concept (Monetary)	As Of	Debit	ifrs-full:Vehicles
478	Total of assets at fair value	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssetsAtFairValue
479	054 - Disclosure - ACQUISITION (Details 1)	Network	*	*	http://canntrust.ca/role/ACQUISITIONDetails1
480	Implied Table	Table	*	*	implied:Table
481	Acquisition-date fair value of total consideration transferred [abstract]	Abstract			ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract
482	Cash Consideration	Concept (Monetary)	As Of	Credit	ifrs-full:CashTransferred
483	Promissory note	Concept (Monetary)	As Of	Credit	ifrs-full:LiabilitiesIncurred
484	Total	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
485	055 - Disclosure - ACQUISITION (Details 2)	Network	*	*	http://canntrust.ca/role/ACQUISITIONDetails2
486	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
487	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
488	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
489	Promissory note	Member			ctst:PromissoryNoteMember
490	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
491	Carrying amount, January 1	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
492	Issuance of promissory note	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromBorrowingsClassifiedAsFinancingActivities
493	Repayment of promissory note	Concept (Monetary)	For Period	Credit	ifrs-full:RepaymentsOfBorrowingsClassifiedAsFinancingActivities
494	Carrying amount	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
495	less: Current portion of promissory note	Concept (Monetary)	As Of	Credit	ifrs-full:ShorttermBorrowings
496	Non-Current portion of promissory note	Concept (Monetary)	As Of	Credit	ifrs-full:LongtermBorrowings
497	056 - Disclosure - ACQUISITION (Detail Textuals)	Network	*	*	http://canntrust.ca/role/AcquisitionDetailTextuals
498	Implied Table	Table	*	*	implied:Table
499	Acquisition-date fair value of total consideration transferred [abstract]	Abstract			ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferredAbstract
500	Aggregate purchase price for greenhouse assets	Concept (Monetary)	As Of	Credit	ifrs-full:AcquisitiondateFairValueOfTotalConsiderationTransferred
501	Value of issuance promissory note for consideration	Concept (Monetary)	For Period	Debit	ctst:AmountOfConsiderationNonInterestBearingPromissoryNote
502	Term of promissory note	Concept (xbrli:durationItemType)	For Period		ctst:TermOfPromissoryNote
503	Number of consecutive annual payments	Concept (Integer)	For Period		ctst:ConsecutiveAnnualPayments
504	Annual payments	Concept (Monetary)	For Period		ctst:AnnualPayments
505	First payment made for promissory note	Concept (Monetary)	For Period	Debit	ctst:DebtInstrumentFirstPaymentMade
506	Acquisition costs	Concept (Monetary)	For Period	Debit	ctst:TransactionCostsExpenseRelatingToAcquisition
507	057 - Disclosure - RESTRICTED CASH AND SHORT-TERM INVESTMENTS (Details)	Network	*	*	http://canntrust.ca/role/RestrictedCashAndShortTermInvestmentsDetails
508	Implied Table	Table	*	*	implied:Table
509	Restricted Cash And Short Term Investments [Abstract]	Abstract			ctst:RestrictedCashAndShortTermInvestmentsAbstract
510	Short-term investment - GIC	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
511	Restricted cash - GIC held as collateral	Concept (Monetary)	As Of	Debit	ifrs-full:NoncurrentRestrictedCashAndCashEquivalents
512	Total restricted cash and short-term investments	Concept (Monetary)	As Of	Debit	ctst:RestrictedCashAndShortTermInvestments
513	058 - Disclosure - RESTRICTED CASH AND SHORT-TERM INVESTMENTS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/RESTRICTEDCASHANDSHORTTERMINVESTMENTSDetails1
514	Implied Table	Table	*	*	implied:Table
515	Restricted Cash And Short Term Investments [Abstract]	Abstract			ctst:RestrictedCashAndShortTermInvestmentsAbstract
516	Term of investment in GIC	Concept (Text/String)	For Period		ctst:TermOfInvestmentInGuaranteedInvestmentCertificate
517	Interest rate on investment	Concept (Percent)	For Period		ctst:InvestmentFixedInterestRate
518	Amount of letter of credit	Concept (Monetary)	For Period	Credit	ctst:LetterOfCredit
519	Amount held in GIC	Concept (Monetary)	As Of	Debit	ctst:AmountHeldInGic
520	Letter of credit expiry period	Concept (Text/String)	For Period		ctst:LetterOfCreditExpiryPeriod
521	059 - Disclosure - INVENTORY AND BIOLOGICAL ASSETS (Details)	Network	*	*	http://canntrust.ca/role/INVENTORYANDBIOLOGICALASSETSDetails
522	Implied Table	Table	*	*	implied:Table
523	Disclosure of reconciliation of changes in biological assets [abstract]	Abstract			ifrs-full:DisclosureOfReconciliationOfChangesInBiologicalAssetsAbstract
524	Carrying amount, January 1	Concept (Monetary)	As Of	Debit	ifrs-full:BiologicalAssets
525	Seeds used	Concept (Monetary)	For Period	Credit	ctst:BiologicalUsed
526	Changes in fair value less costs to sell due to biological transformation	Concept (Monetary)	For Period	Credit	ifrs-full:GainsLossesOnChangeInFairValueEstimatesOfBiologicalAssetsForCurrentPeriod
527	Production costs capitalized	Concept (Monetary)	For Period	Credit	ctst:CapitalizationOfProductionCostsOfBiologicalAssets
528	Transferred to inventory upon harvest	Concept (Monetary)	For Period	Credit	ifrs-full:DecreaseDueToHarvestBiologicalAssets
529	Carrying amount	Concept (Monetary)	As Of	Debit	ifrs-full:BiologicalAssets
530	060 - Disclosure - INVENTORY AND BIOLOGICAL ASSETS (Details 1)	Network	*	*	http://canntrust.ca/role/INVENTORYANDBIOLOGICALASSETSDetails1
531	Implied Table	Table	*	*	implied:Table
532	Disclosure of detailed information about biological assets [abstract]	Abstract			ifrs-full:DisclosureOfDetailedInformationAboutBiologicalAssetsAbstract
533	Carrying amount of seeds	Concept (Monetary)	As Of	Debit	ctst:CarryingAmountOfSeeds
534	Carrying amount of live plants	Concept (Monetary)	As Of	Debit	ctst:CarryingAmountOfLivePlants
535	Carrying amount	Concept (Monetary)	As Of	Debit	ifrs-full:BiologicalAssets
536	061 - Disclosure - INVENTORY AND BIOLOGICAL ASSETS (Details 2)	Network	*	*	http://canntrust.ca/role/INVENTORYANDBIOLOGICALASSETSDetails2
537	Disclosure of detailed information about biological assets [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBiologicalAssetsTable
538	Biological assets [axis]	Axis			ifrs-full:BiologicalAssetsAxis
539	Biological assets [member]	Member			ifrs-full:BiologicalAssetsMember
540	Dried Cannabis	Member			ctst:DryCannabisMember
541	Extracts	Member			ctst:ExtractsBiologicalAssetsMember
542	Other	Member			ctst:OtherBiologicalAssetsMember
543	Disclosure of detailed information about biological assets [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBiologicalAssetsLineItems
544	Accessories	Concept (Monetary)	As Of	Debit	ctst:Accessories
545	Packaging and supplies	Concept (Monetary)	As Of	Debit	ifrs-full:CurrentPackagingAndStorageMaterials
546	Work-in-Progress	Concept (Monetary)	As Of	Debit	ifrs-full:WorkInProgress
547	Finished Goods	Concept (Monetary)	As Of	Debit	ifrs-full:FinishedGoods
548	Total Inventory	Concept (Monetary)	As Of	Debit	ifrs-full:InventoriesTotal
549	062 - Disclosure - INVENTORY AND BIOLOGICAL ASSETS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/InventoryAndBiologicalAssetsDetailTextuals
550	Disclosure of detailed information about biological assets [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBiologicalAssetsTable
551	Range [axis]	Axis			ifrs-full:RangeAxis
552	Ranges [member]	Member			ifrs-full:RangesMember
553	Minimum	Member			ifrs-full:BottomOfRangeMember
554	Maximum	Member			ifrs-full:TopOfRangeMember
555	Biological assets [axis]	Axis			ifrs-full:BiologicalAssetsAxis
556	Biological assets [member]	Member			ifrs-full:BiologicalAssetsMember
557	Harvest cannabis	Member			ctst:HarvestCannabisMember
558	Harvest cannabis trim	Member			ctst:HarvestCannabisTrimMember
559	Dried Cannabis	Member			ctst:DryCannabisMember
560	Extracts	Member			ctst:ExtractsBiologicalAssetsMember
561	Disclosure of detailed information about biological assets [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBiologicalAssetsLineItems
562	Percentage of weighted average expected yield harvest	Concept (Percent)	As Of		ctst:PercentageOfWeightedAverageExpectedYield
563	Average number of days point of propagation harvest	Concept (xbrli:durationItemType)	For Period		ctst:AverageNumberOfDaysHarvest
564	Biological assets yield net of waste	Concept (Decimal)	For Period		ctst:BiologicalAssetsYieldNetOfWaste
565	Net selling price of biological asset per gram	Concept (Share)	For Period		ctst:NetSellingPriceOfBiologicalAssetPerGram
566	Weighted average selling price	Concept (Share)	For Period		ctst:WeightedAverageSellingPrice
567	Selling costs per gram	Concept (Share)	For Period		ctst:SellingCostsPerGram
568	Percentage of decrease in selling price of fair value in biological assets	Concept (Percent)	As Of		ctst:PercentageOfDecreaseInSellingPriceOfFairValueInBiologicalAssets
569	Decrease in fair value of the biological assets by perecntage of decrease in selling prices	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughSellingPriceInFairValueOfBiologicalAssets
570	Percentage of decrease in fair value of biological assets	Concept (Percent)	As Of		ctst:PercentageOfDecreaseInFairValueOfBiologicalAssets
571	Decrease in fair value of the biological assets by perecntage of decrease in yield	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseThroughTransfersAndOtherChangesBiologicalAssets
572	Quantity of inventory	Concept (Decimal)	For Period		ctst:QuantityOfInventory
573	063 - Disclosure - PROPERTY AND EQUIPMENT (Details)	Network	*	*	http://canntrust.ca/role/PropertyAndEquipmentDetail
574	Disclosure of detailed information about property, plant and equipment [table]	Table	*	*	ifrs-full:DisclosureOfPropertyPlantAndEquipmentTable
575	Classes of property, plant and equipment [axis]	Axis			ifrs-full:ClassesOfPropertyPlantAndEquipmentAxis
576	Property, plant and equipment [member]	Member			ifrs-full:PropertyPlantAndEquipmentMember
577	Land	Member			ifrs-full:LandMember
578	Leasehold Improvements	Member			ifrs-full:LeaseholdImprovementsMember
579	Buildings, Greenhouse and Improvements	Member			ifrs-full:BuildingsMember
580	Equipment	Member			ifrs-full:OfficeEquipmentMember
581	Other	Member			ifrs-full:OtherPropertyPlantAndEquipmentMember
582	Carrying amount, accumulated depreciation, amortisation and impairment and gross carrying amount [axis]	Axis			ifrs-full:CarryingAmountAccumulatedDepreciationAmortisationAndImpairmentAndGrossCarryingAmountAxis
583	Carrying amount [member]	Member			ifrs-full:CarryingAmountMember
584	Accumulated Amortization	Member			ifrs-full:AccumulatedDepreciationAndAmortisationMember
585	Carrying Amounts	Member			ifrs-full:GrossCarryingAmountMember
586	Disclosure of detailed information about property, plant and equipment [line items]	LineItems			ifrs-full:DisclosureOfPropertyPlantAndEquipmentLineItems
587	Balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
588	Additions	Concept (Monetary)	For Period	Debit	ifrs-full:AdditionsOtherThanThroughBusinessCombinationsPropertyPlantAndEquipment
589	Amortization	Concept (Monetary)	For Period	Debit	ctst:AdjustmentForAmortizations
590	Disposals	Concept (Monetary)	For Period	Credit	ifrs-full:DisposalsPropertyPlantAndEquipment
591	Balance	Concept (Monetary)	As Of	Debit	ifrs-full:PropertyPlantAndEquipment
592	064 - Disclosure - PROPERTY AND EQUIPMENT (Detail Textuals)	Network	*	*	http://canntrust.ca/role/PropertyAndEquipmentDetailTextuals
593	Implied Table	Table	*	*	implied:Table
594	Property, plant and equipment [abstract]	Abstract			ifrs-full:PropertyPlantAndEquipmentAbstract
595	Amortization	Concept (Monetary)	For Period	Debit	ctst:AdjustmentForAmortizations
596	Cost of goods sold include amortization	Concept (Monetary)	For Period	Debit	ctst:CostOfGoodsSoldPartOfAmortization
597	065 - Disclosure - IMPAIRMENT (Detail Textuals)	Network	*	*	http://canntrust.ca/role/IMPAIRMENTDetails
598	Implied Table	Table	*	*	implied:Table
599	Disclosure of impairment loss and reversal of impairment loss [abstract]	Abstract			ifrs-full:DisclosureOfImpairmentLossAndReversalOfImpairmentLossAbstract
600	Impairment loss	Concept (Monetary)	For Period	Debit	ifrs-full:ImpairmentLoss
601	Reduction in carrying value of intangible assets	Concept (Monetary)	As Of	Debit	ifrs-full:IntangibleAssetsOtherThanGoodwillCarryingAmountOfRevaluedAssets
602	066 - Disclosure - FINANCIAL ASSETS (Details)	Network	*	*	http://canntrust.ca/role/FINANCIALASSETSDetails
603	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
604	Warrant [Axis]	Axis			ctst:WarrantAxis
605	Warrant [Domain]	Member			ctst:WarrantDomain
606	Issuance of warrants	Member			ctst:IssuanceOfWarrantsOneMember
607	Issuance of warrants	Member			ctst:IssuanceOfWarrantsTwoMember
608	Issuance of warrants	Member			ctst:IssuanceOfWarrantsThreeMember
609	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
610	Carrying amount, January 1	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
611	Convertible debenture	Concept (Monetary)	For Period	Debit	ctst:ConvertibleDebenture
612	Received Warrants on purchase of shares	Concept (Monetary)	For Period	Debit	ctst:ReceivedWarrantsOnPurchaseOfShares
613	Carrying amount	Concept (Monetary)	As Of	Debit	ifrs-full:FinancialAssets
614	067 - Disclosure - FINANCIAL ASSETS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/FinancialAssetsDetailTextuals
615	Disclosure of financial assets [table]	Table	*	*	ifrs-full:DisclosureOfFinancialAssetsTable
616	Type Of Agreement [Axis]	Axis			ctst:TypeOfAgreementAxis
617	Type Of Agreement [Domain]	Member			ctst:TypeOfAgreementDomain
618	GWAH	Member			ctst:GreyWolfAnimalHealthIncMember
619	Warrant [Axis]	Axis			ctst:WarrantAxis
620	Warrant [Domain]	Member			ctst:WarrantDomain
621	Issuance of warrants	Member			ctst:IssuanceOfWarrantsOneMember
622	Issuance of warrants	Member			ctst:IssuanceOfWarrantsTwoMember
623	Issuance of warrants	Member			ctst:IssuanceOfWarrantsThreeMember
624	Disclosure of financial assets [line items]	LineItems			ifrs-full:DisclosureOfFinancialAssetsLineItems
625	Value of debenture	Concept (Monetary)	As Of	Credit	ifrs-full:NotesAndDebenturesIssued
626	Issuance of warrant exercisable	Concept (Monetary)	For Period	Debit	ctst:IssuanceOfWarrantExercisable
627	Common stock share purchase	Concept (Shares)	For Period		ctst:CommonStockSharePurchase
628	Common stock price per share	Concept (Share)	For Period		ctst:CommonStockPricePerShare
629	Issuance of warrants	Concept (Monetary)	For Period	Debit	ctst:IssuanceOfWarrants
630	Percentage of warrants expected dividend yield	Concept (Percent)	For Period		ctst:WarrantsExpectedDividendYield
631	Warrants average expected volatility	Concept (Percent)	For Period		ctst:WarrantsAverageExpectedVolatility
632	Warrants average risk-free rate	Concept (Percent)	For Period		ctst:WarrantsAverageRisk-FreeRate
633	Warrants share price per share	Concept (Share)	For Period		ctst:WarrantsSharePricePerShare
634	Percentage of warrant forfeiture rate	Concept (Percent)	For Period		ctst:PercentageOfWarrantForfeitureRate
635	Warrant expected life	Concept (xbrli:durationItemType)	For Period		ctst:WarrantExpectedLife
636	Percentage of decrease In volatility rate	Concept (Percent)	For Period		ctst:PercentageOfDecreaseInVolatilityRate
637	Decrease in volatility valuation of warrants	Concept (Monetary)	For Period	Debit	ctst:DecreaseInVolatilityValuationOfWarrants
638	Decrease in valuation of warrants	Concept (Monetary)	For Period	Debit	ctst:DecreaseInValuationOfWarrants
639	Percentage of decrease in valuation of warrants	Concept (Percent)	For Period		ctst:PercentageOfDecreaseInValuationOfWarrants
640	Unsecured interest bearing convertible debentures	Concept (Monetary)	For Period	Debit	ctst:UnsecuredInterestBearingConvertibleDebentures
641	Percentage of debentures bear coupon	Concept (Percent)	For Period		ctst:PercentageOfDebenturesBearCoupon
642	Additional investment	Concept (Monetary)	For Period	Debit	ctst:AdditionalInvestment
643	Considerations paid allocated to common shares	Concept (Monetary)	For Period	Debit	ctst:ConsiderationsPaidForCommonShares
644	Considerations paid allocated to warrants	Concept (Monetary)	For Period	Debit	ctst:ConsiderationsPaidForWarrant
645	068 - Disclosure - MORTGAGE (Details)	Network	*	*	http://canntrust.ca/role/MortgageDetails
646	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
647	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
648	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
649	Mortgage	Member			ctst:MortgagePayableMember
650	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
651	Carrying amount, January 1	Concept (Monetary)	As Of	Credit	ctst:CarryingAmountMortgagePayable
652	Advance of mortgage financing (net of costs)	Concept (Monetary)	For Period	Credit	ctst:MortgageFinancingAdvancesNetOfCosts
653	Second advance of mortgage financing (net of costs)	Concept (Monetary)	For Period	Credit	ctst:MortgageFinancingAdvancesOneNetOfCosts
654	Accretion expense	Concept (Monetary)	For Period	Debit	ctst:MortgageFinancingAccretionExpense
655	Mortgage payments	Concept (Monetary)	For Period	Debit	ctst:RepaymentsOfBorrowings
656	Carrying amount	Concept (Monetary)	As Of	Credit	ctst:CarryingAmountMortgagePayable
657	Less: current portion of mortage	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentSecuredBankLoansReceivedAndCurrentPortionOfNoncurrentSecuredBankLoansReceived
658	Non-current portion of mortgage	Concept (Monetary)	As Of	Credit	ifrs-full:NoncurrentPortionOfNoncurrentSecuredBankLoansReceived
659	069 - Disclosure - MORTGAGE (Detail Textuals)	Network	*	*	http://canntrust.ca/role/MortgageDetailTextuals
660	Disclosure of detailed information about borrowings [table]	Table	*	*	ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsTable
661	Borrowings by name [axis]	Axis			ifrs-full:BorrowingsByNameAxis
662	Borrowings by name [member]	Member			ifrs-full:BorrowingsByNameMember
663	Mortgage	Member			ctst:MortgagePayableMember
664	Disclosure of detailed information about borrowings [line items]	LineItems			ifrs-full:DisclosureOfDetailedInformationAboutBorrowingsLineItems
665	Amount of mortgage financing	Concept (Monetary)	As Of	Credit	ifrs-full:Borrowings
666	Advance of mortgage financing	Concept (Monetary)	For Period	Credit	ctst:MortgageFinancingAdvancesOneNetOfCosts
667	Term of advances	Concept (Text/String)	For Period		ifrs-full:BorrowingsMaturity
668	Amortization period of advances	Concept (xbrli:durationItemType)	For Period		ctst:BorrowingsAmortizationPeriod
669	Annual interest rate	Concept (Percent)	As Of		ifrs-full:BorrowingsInterestRate
670	Borrowing costs incurred	Concept (Monetary)	For Period		ifrs-full:BorrowingCostsIncurred
671	Effective interest rate	Concept (Percent)	For Period		ctst:BorrowingsEffectiveInterestRate
672	070 - Disclosure - SHARE CAPITAL (Details)	Network	*	*	http://canntrust.ca/role/SHARECAPITALDetails
673	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
674	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
675	Equity [member]	Member			ifrs-full:EquityMember
676	Share Capital	Member			ifrs-full:IssuedCapitalMember
677	Statement of changes in equity [line items]	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
678	Balance (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
679	Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
680	February 2017 Private Placement (in shares)	Concept (Shares)	For Period		ctst:IncreaseThroughCommonSharesIssuedInPrivatePlacementEquity
681	February 2017 Private Placement	Concept (Monetary)	For Period	Credit	ctst:IncreaseThroughIssuanceOfSpecialWarrantsInPrivatePlacementEquity
682	March 2017 Share issuance on exercise of convertible debt (in shares)	Concept (Shares)	For Period		ctst:ShareIssuanceOnExerciseOfConvertibleDebt
683	March 2017 Share issuance on exercise of convertible debt	Concept (Monetary)	For Period	Credit	ctst:AmountOfShareIssuanceOnExerciseOfConvertibleDebt
684	March 2017 Exercise of warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfWarrantsEquityShares
685	March 2017 Exercise of warrants	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
686	March 2017 Share issuance on exercise of convertible debt due on demand (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughShareIssuanceOnExerciseOfConvertibleDebtDueOnDemand
687	March 2017 Share issuance on exercise of convertible debt due on demand	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughAmountOfShareIssuanceOnExerciseOfConvertibleDebtDueOnDemand
688	March 2017 Share issuance as partial consideration for Warrant Financing (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughShareIssuanceAsPartialConsiderationForWarrantFinancing
689	March 2017 Share issuance as partial consideration for Warrant Financing	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughAmountOfShareIssuanceAsPartialConsiderationForWarrantFinancing
690	April 2017 Share issuance in lieu of services (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughShareIssuanceInLieuOfServices
691	April 2017 Share issuance in lieu of services	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughAmountOfShareIssuanceInLieuOfServices
692	August 2017 Share issuance on automatic conversion of convertible debt (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughConversionOfConvertibleInstrumentsShares
693	August 2017 Share issuance on automatic conversion of convertible debt	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughConversionOfConvertibleInstruments
694	August 2017 Share issuance on automatic conversion of Special Warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughConversionOfSpecialWarrants
695	August 2017 Share issuance on automatic conversion of Special Warrants	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughConversionOfAmountOfSpecialWarrants
696	September 2017 Exercise of warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfWarrantsEquityShares1
697	September 2017 Exercise of warrants	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughExerciseOfWarrantsValueEquity1
698	Exercise of stock options (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfOptionsShares
699	November 27, 2017 Exercise of stock options	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfOptions
700	November 30, 2017 Private Placement (in shares)	Concept (Shares)	For Period		ctst:IncreaseThroughCommonSharesIssuedInPrivatePlacementEquity1
701	November 30, 2017 Private Placement	Concept (Monetary)	For Period	Credit	ctst:IncreaseThroughIssuanceOfSpecialWarrantsInPrivatePlacementValueEquity1
702	Exercise of broker warrants (in shares)	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughExerciseOfBrokerWarrants
703	Exercise of broker warrants	Concept (Monetary)	For Period	Credit	ctst:IncreaseDecreaseThroughExerciseOfBrokerWarrantsAmount
704	Units Issued (in shares)	Concept (Shares)	For Period		ctst:AmountOfIssueOfEquity
705	Units Issued	Concept (Monetary)	For Period	Credit	ifrs-full:IssueOfEquity
706	Balance (in shares)	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
707	Balance	Concept (Monetary)	As Of	Credit	ifrs-full:Equity
708	071 - Disclosure - SHARE CAPITAL (Details 1)	Network	*	*	http://canntrust.ca/role/ShareCapitalDetails1
709	Implied Table	Table	*	*	implied:Table
710	Disclosure of classes of share capital [abstract]	Abstract			ifrs-full:DisclosureOfClassesOfShareCapitalAbstract
711	Numerator - basic and diluted earnings per share:	Abstract			ifrs-full:BasicAndDilutedEarningsPerShareAbstract
712	Net (loss) income and comprehensive (loss) income	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
713	Denominator - basic earnings per share:	Abstract			ifrs-full:BasicEarningsPerShareAbstract
714	Weighted average number of shares - basic	Concept (Shares)	For Period		ifrs-full:WeightedAverageShares
715	Denominator - diluted earnings per share:	Abstract			ifrs-full:DilutedEarningsPerShareAbstract
716	Stock Options	Concept (Shares)	For Period		ctst:DilutedEarningsPerShareStockOptions
717	Warrants	Concept (Shares)	For Period		ctst:DilutedEarningsPerShareWarrants
718	Weighted average number of shares - diluted	Concept (Shares)	For Period		ifrs-full:AdjustedWeightedAverageShares
719	Earnings (loss) per share - basic	Concept (Share)	For Period		ifrs-full:BasicEarningsLossPerShare
720	Earnings (loss) per share - diluted	Concept (Share)	For Period		ifrs-full:DilutedEarningsLossPerShare
721	072 - Disclosure - SHARE CAPITAL (Detail Textuals)	Network	*	*	http://canntrust.ca/role/ShareCapitalDetailTextuals
722	Disclosure of classes of share capital [table]	Table	*	*	ifrs-full:DisclosureOfClassesOfShareCapitalTable
723	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
724	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
725	Breakthru Beverage Group (Breakthru)	Member			ifrs-full:SubsidiariesMember
726	Statement of changes in equity [line items]	LineItems			ifrs-full:StatementOfChangesInEquityLineItems
727	Number of common share issue	Concept (Shares)	As Of		ifrs-full:NumberOfSharesIssued
728	Subscription price per common share	Concept (Share)	As Of		ctst:SubscriptionPricePerShare
729	Proceeds from issuing shares	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssuingShares
730	Value of convertible debt	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughConversionOfConvertibleInstruments
731	Carying amount of convertible debt	Concept (Monetary)	For Period	Credit	ctst:CarryingAmountOfConvertibleDebt
732	Accrued interest	Concept (Monetary)	For Period	Debit	ctst:AccruedInterest
733	Conversion price per share	Concept (Share)	As Of		ctst:ConversionPricePerShare
734	Number of common shares converted	Concept (Shares)	For Period		ctst:IncreaseDecreaseThroughConversionOfCommonShares
735	Number of warrant exercise	Concept (Integer)	For Period		ctst:NumberOfWarrantExercise
736	Carrying amount of warrants	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
737	Due on demand convertible debt	Concept (Monetary)	For Period	Credit	ctst:DueOnDemandConvertibleDebt
738	Amount of convertible debt	Concept (Monetary)	As Of	Credit	ctst:AmountOfConvertibleDebt
739	Derivative liability at carrying value	Concept (Monetary)	As Of	Credit	ifrs-full:DerivativeFinancialLiabilities
740	Number of warrants	Concept (Shares)	As Of		ctst:NumberOfWarrants
741	Warrants converted into common shares	Concept (Shares)	As Of		ctst:WarrantsConvertedIntoCommonShares
742	Conversion price of warrant	Concept (Share)	As Of		ctst:ConversionPriceWarrant
743	Conversion price of convertible debt	Concept (Share)	As Of		ctst:ConversionPriceConvertibleDebt
744	Number of stock options exercised	Concept (Shares)	For Period		ctst:NumberOfStockOptionsExercised
745	Exercise price share options	Concept (Share)	As Of		ctst:ExercisePriceShareOptions
746	Agent's Fee	Concept (Monetary)	For Period	Debit	ifrs-full:BrokerageFeeExpense
747	Percentage of broker warrant	Concept (Percent)	For Period		ctst:PercentageOfBrokerWarrant
748	Costs for the private placement	Concept (Monetary)	For Period	Credit	ctst:IncreaseThroughIssuanceOfSpecialWarrantsInPrivatePlacementEquity
749	Purchase of common share	Concept (Shares)	For Period		ctst:PurchaseOfCommonShare
750	Average exercise price	Concept (Share)	For Period		ctst:AverageExercisePrice
751	Carrying value of option	Concept (Monetary)	For Period	Debit	ctst:CarryingValueOfOption
752	Gross proceeds of exercise price	Concept (Monetary)	For Period	Credit	ctst:GrossProceedsOfExercisePrice
753	Agent Warrants Exercised	Concept (Shares)	For Period		ctst:AgentWarrantsExercised
754	Proceeds from issuance of common shares	Concept (Monetary)	For Period	Credit	ctst:ProceedsFromIssuanceOfCommonShares
755	Exercise of broker warrants	Concept (Shares)	For Period		ctst:ExerciseOfBrokerWarrants
756	Exercise purchase of broker warrants	Concept (Shares)	For Period		ctst:ExercisePurchaseOfBrokerWarrants
757	Exercise price of broker warrants	Concept (Share)	For Period		ctst:ExercisePriceOfBrokerWarrants
758	Proceeds of exercised broker warrants	Concept (Monetary)	For Period	Credit	ctst:ProceedsOfExercisedBrokerWarrants
759	Carrying value of warrants	Concept (Monetary)	For Period	Credit	ctst:CarryingValueOfWarrants
760	Exercise of broker warrants	Concept (Shares)	For Period		ctst:ExerciseOfBrokerWarrants1
761	Exercise purchase of broker warrants	Concept (Shares)	For Period		ctst:ExercisePurchaseOfBrokerWarrants1
762	Exercise price of broker warrants	Concept (Share)	For Period		ctst:ExercisePriceOfBrokerWarrants1
763	Proceeds of exercised broker warrants	Concept (Monetary)	For Period	Credit	ctst:ProceedsOfExercisedBrokerWarrants1
764	Carrying value of warrants	Concept (Monetary)	For Period	Credit	ctst:CarryingValueOfWarrants1
765	Exercise of broker warrants	Concept (Shares)	For Period		ctst:ExerciseOfBrokerWarrants2
766	Exercise purchase of broker warrants	Concept (Shares)	For Period		ctst:ExercisePurchaseOfBrokerWarrants2
767	Exercise price of broker warrants	Concept (Share)	For Period		ctst:ExercisePriceOfBrokerWarrants2
768	Proceeds of exercised broker warrants	Concept (Monetary)	For Period	Credit	ctst:ProceedsOfExercisedBrokerWarrants2
769	Carrying value of warrants	Concept (Monetary)	For Period	Credit	ctst:CarryingValueOfWarrants2
770	Bought deal basis of units	Concept (Shares)	For Period		ctst:BoughtDealBasisOfUnits
771	Bought deal basis price per unit	Concept (Share)	For Period		ctst:BoughtDealBasisPricePerUnit
772	Gross proceeds of bought deal basis	Concept (Monetary)	For Period	Credit	ctst:GrossProceedsOfBoughtDealBasis
773	Transaction cost of bought deal	Concept (Monetary)	For Period	Debit	ctst:TransactionCostOfBoughtDeal
774	Common share capital	Concept (Monetary)	For Period	Credit	ctst:CommonShareCapital
775	Share warrants	Concept (Monetary)	For Period	Credit	ctst:ShareWarrants
776	Purchase of warrant	Concept (Shares)	For Period		ctst:PurchaseOfWarrant
777	073 - Disclosure - STOCK OPTION PLAN (Details)	Network	*	*	http://canntrust.ca/role/STOCKOPTIONPLANDetails
778	Implied Table	Table	*	*	implied:Table
779	Disclosure of terms and conditions of share-based payment arrangement [abstract]	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
780	Options issued	Abstract			ctst:NumberOfShareOptionsAbstract
781	Options issued at the begining	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
782	Options granted	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsGrantedInSharebasedPaymentArrangement
783	Options forfeited	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsForfeitedInSharebasedPaymentArrangement
784	Options exercised	Concept (Decimal)	For Period		ifrs-full:NumberOfShareOptionsExercisedInSharebasedPaymentArrangement
785	Options issued at the ending	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
786	Weighted Average exercise price	Abstract			ctst:WeightedAverageExercisePriceOfShareOptionsAbstract
787	Options issued at the begining	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
788	Options granted	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsGrantedInSharebasedPaymentArrangement
789	Options forfeited	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsForfeitedInSharebasedPaymentArrangement
790	Options exercised	Concept (Monetary)	For Period		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisedInSharebasedPaymentArrangement
791	Options issued at the ending	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
792	074 - Disclosure - STOCK OPTION PLAN (Details 1)	Network	*	*	http://canntrust.ca/role/STOCKOPTIONPLANDetails1
793	Disclosure of number and weighted average remaining contractual life of outstanding share options [table]	Table	*	*	ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsTable
794	Ranges of exercise prices for outstanding share options [axis]	Axis			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsAxis
795	Ranges of exercise prices for outstanding share options [member]	Member			ifrs-full:RangesOfExercisePricesForOutstandingShareOptionsMember
796	$0.00 - $3.50	Member			ctst:RangesOfExercisePricesForOutstandingShareOptionsFrom0.00To3.50Member
797	$3.51 - $6.72	Member			ctst:RangesOfExercisePricesForOutstandingShareOptionsFrom3.51To6.72Member
798	$6.73 - $9.00	Member			ctst:RangesOfExercisePricesForOutstandingShareOptionsFrom6.73To9.00Member
799	$9.01 - $11.88	Member			ctst:RangesOfExercisePricesForOutstandingShareOptionsFrom9.01To11.88Member
800	Range [axis]	Axis			ifrs-full:RangeAxis
801	Ranges [member]	Member			ifrs-full:RangesMember
802	Minimum	Member			ifrs-full:BottomOfRangeMember
803	Maximum	Member			ifrs-full:TopOfRangeMember
804	Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]	LineItems			ifrs-full:DisclosureOfNumberAndWeightedAverageRemainingContractualLifeOfOutstandingShareOptionsLineItems
805	Number of options outstanding	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
806	Weighted Average Remaining Contractual Life (years)	Concept (Decimal)	As Of		ifrs-full:WeightedAverageRemainingContractualLifeOfOutstandingShareOptions
807	Options Outstanding, Exercise Price per share	Concept (Monetary)	As Of		ifrs-full:ExercisePriceOfOutstandingShareOptions
808	Number Exercisable	Concept (Decimal)	As Of		ifrs-full:NumberOfShareOptionsExercisableInSharebasedPaymentArrangement
809	Options Exercisable, Exercise Price per share	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsExercisableInSharebasedPaymentArrangement
810	075 - Disclosure - STOCK OPTION PLAN (Details 2)	Network	*	*	http://canntrust.ca/role/STOCKOPTIONPLANDetails2
811	Disclosure of terms and conditions of share-based payment arrangement [table]	Table	*	*	ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementTable
812	Range [axis]	Axis			ifrs-full:RangeAxis
813	Ranges [member]	Member			ifrs-full:RangesMember
814	Minimum	Member			ifrs-full:BottomOfRangeMember
815	Maximum	Member			ifrs-full:TopOfRangeMember
816	Disclosure of terms and conditions of share-based payment arrangement [line items]	LineItems			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementLineItems
817	Risk-free interest rate	Concept (Percent)	For Period		ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
818	Expected life of options (years)	Concept (Decimal)	For Period		ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
819	Expected annualized volatility	Concept (Percent)	For Period		ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
820	Expected dividend yield	Concept (Monetary)	For Period		ifrs-full:ExpectedDividendShareOptionsGranted
821	Forfeiture rate	Concept (Percent)	For Period		ctst:ForfeitureRateShareOptionsGranted
822	Exercise price (per share)	Concept (Monetary)	For Period		ifrs-full:ExercisePriceShareOptionsGranted
823	076 - Disclosure - STOCK OPTION PLAN (Detail Textuals)	Network	*	*	http://canntrust.ca/role/StockOptionPlanDetailTextuals
824	Implied Table	Table	*	*	implied:Table
825	Disclosure of terms and conditions of share-based payment arrangement [abstract]	Abstract			ifrs-full:DisclosureOfTermsAndConditionsOfSharebasedPaymentArrangementAbstract
826	Value of exercise of options	Concept (Monetary)	For Period		ifrs-full:ExercisePriceShareOptionsGranted
827	Share-based compensation expense	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForSharebasedPayments
828	077 - Disclosure - RESERVE FOR WARRANTS (Details)	Network	*	*	http://canntrust.ca/role/ReserveForWarrantsDetails
829	Disclosure Of Reserves For Warrants [Table]	Table	*	*	ctst:DisclosureOfReservesForWarrantsTable
830	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
831	Equity [member]	Member			ifrs-full:EquityMember
832	Warrant	Member			ctst:WarrantsMember
833	Reserve For Warrants [Axis]	Axis			ctst:ReserveForWarrantsAxis
834	Reserve For Warrants [Domain]	Member			ctst:ReserveForWarrantsDomain
835	February 2017 Private Placement	Member			ctst:FebruaryTwoZeroOneSevenPrivatePlacementsMember
836	February 2017 Warrants issued as partial consideration for Private Placement	Member			ctst:FebruaryTwoZeroOneSevenWarrantsIssuedAsPartialConsiderationForPrivatePlacementMember
837	March 2017 Exercise of warrants	Member			ctst:MarchTwoZeroOneSevenExerciseOfWarrantsMember
838	August 2017 Share issuance on automatic conversion of Special Warrants	Member			ctst:AugustTwoZeroOneSevenShareIssuanceOnAutomaticConversionOfSpecialWarrantsMember
839	September 2017 Exercise of warrants	Member			ctst:SeptemberTwoZeroOneSevenExerciseOfWarrantMember
840	November 30, 2017 Warrants issued as partial consdieration for Private Placement	Member			ctst:NovemberThirtyTwoZeroOneSevenWarrantsIssuedAsPartialConsdierationForPrivatePlacementMember
841	Exercise of broker warrants	Member			ctst:ExerciseOfBrokerWarrantsMember
842	Exercise of warrants	Member			ctst:ExerciseOfWarrantsMember
843	Exercise of broker warrants	Member			ctst:ExerciseOfBrokerWarrants1Member
844	Exercise of broker warrants	Member			ctst:ExerciseOfBrokerWarrants2Member
845	Warrants issued as partial consideration of Bought Deal	Member			ctst:WarrantsIssuedAsPartialConsiderationOfBoughtDealMember
846	Warrant issued as part of Breakthru Deal	Member			ctst:WarrantIssuedAsPartOfBreakthruDealMember
847	Disclosure Of Reserves For Warrants [Line Items]	LineItems			ctst:DisclosureOfReservesForWarrantsLineItems
848	Number of Warrants	Concept (Shares)	As Of		ctst:NumberOfWarrantsOutstanding
849	Number of common shares to be issued on exercise of warrants	Concept (Shares)	As Of		ctst:ClassOfWarrantNumberOfSecuritiesCalledByWarrants
850	Amount	Concept (Monetary)	As Of	Credit	ctst:WarrantsOutstandingValue
851	Weighted average exercise price	Concept (Share)	As Of		ctst:WeightedAverageExercisePriceOfWarrant
852	Weighted average remaining life in years	Concept (xbrli:durationItemType)	For Period		ctst:WeightedAverageRemainingContractualLifeOfOutstandingWarrants
853	078 - Disclosure - RESERVE FOR WARRANTS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/Reserveforwarrantsdetailstextuals
854	Disclosure Of Reserves For Warrants [Table]	Table	*	*	ctst:DisclosureOfReservesForWarrantsTable
855	Components of equity [axis]	Axis			ifrs-full:ComponentsOfEquityAxis
856	Equity [member]	Member			ifrs-full:EquityMember
857	Warrant	Member			ctst:WarrantsMember
858	Range [axis]	Axis			ifrs-full:RangeAxis
859	Ranges [member]	Member			ifrs-full:RangesMember
860	Minimum	Member			ifrs-full:BottomOfRangeMember
861	Maximum	Member			ifrs-full:TopOfRangeMember
862	Disclosure Of Reserves For Warrants [Line Items]	LineItems			ctst:DisclosureOfReservesForWarrantsLineItems
863	Number of warrant exercise	Concept (Integer)	For Period		ctst:NumberOfStockOptionExercise
864	Purchase of common share	Concept (Shares)	For Period		ctst:PurchaseOfCommonShare
865	Conversion price of warrant	Concept (Share)	As Of		ctst:ConversionPriceWarrant
866	Proceeds from issuing shares	Concept (Monetary)	For Period	Debit	ifrs-full:ProceedsFromIssuingShares
867	Carrying amount of warrants	Concept (Monetary)	For Period	Credit	ifrs-full:IncreaseDecreaseThroughExerciseOfWarrantsEquity
868	Exercise of broker warrants	Concept (Shares)	For Period		ctst:ExerciseOfBrokerWarrants
869	Exercise purchase of broker warrants	Concept (Shares)	For Period		ctst:ExercisePurchaseOfBrokerWarrants
870	Exercise price of broker warrants	Concept (Share)	For Period		ctst:ExercisePriceOfBrokerWarrants
871	Proceeds of exercised broker warrants	Concept (Monetary)	For Period	Credit	ctst:ProceedsOfExercisedBrokerWarrants
872	Carrying value of warrants	Concept (Monetary)	For Period	Credit	ctst:CarryingValueOfWarrants
873	Exercise of broker warrants	Concept (Shares)	For Period		ctst:ExerciseOfBrokerWarrants1
874	Exercise purchase of broker warrants	Concept (Shares)	For Period		ctst:ExercisePurchaseOfBrokerWarrants1
875	Exercise price of broker warrants	Concept (Share)	For Period		ctst:ExercisePriceOfBrokerWarrants1
876	Proceeds of exercised broker warrants	Concept (Monetary)	For Period	Credit	ctst:ProceedsOfExercisedBrokerWarrants1
877	Carrying value of warrants	Concept (Monetary)	For Period	Credit	ctst:CarryingValueOfWarrants1
878	Exercise of broker warrants	Concept (Shares)	For Period		ctst:ExerciseOfBrokerWarrants2
879	Exercise purchase of broker warrants	Concept (Shares)	For Period		ctst:ExercisePurchaseOfBrokerWarrants2
880	Exercise price of broker warrants	Concept (Share)	For Period		ctst:ExercisePriceOfBrokerWarrants2
881	Proceeds of exercised broker warrants	Concept (Monetary)	For Period	Credit	ctst:ProceedsOfExercisedBrokerWarrants2
882	Carrying value of warrants	Concept (Monetary)	For Period	Credit	ctst:CarryingValueOfWarrants2
883	Bought deal basis of units	Concept (Shares)	For Period		ctst:BoughtDealBasisOfUnits
884	Bought deal basis price per unit	Concept (Share)	For Period		ctst:BoughtDealBasisPricePerUnit
885	Gross proceeds of bought deal basis	Concept (Monetary)	For Period	Credit	ctst:GrossProceedsOfBoughtDealBasis
886	Warrant exercise price	Concept (Decimal)	For Period		ctst:ClassOfWarrantOrRightsExercisePriceOfWarrantsOrRights
887	Weighted average trading price of common shares	Concept (Share)	For Period		ctst:ThresholdStockPriceCommonStock
888	Number of trading days	Concept (xbrli:durationItemType)	For Period		ctst:CommonStockThresholdTradingDays
889	Share warrants	Concept (Monetary)	For Period	Credit	ctst:ShareWarrants
890	Transaction fees against warrant	Concept (Monetary)	For Period	Debit	ctst:TransactionFeesAgainstWarrant
891	Expected dividend yield	Concept (Monetary)	For Period		ifrs-full:ExpectedDividendShareOptionsGranted
892	Average expected volatility	Concept (Percent)	For Period		ifrs-full:DescriptionOfExpectedVolatilityShareOptionsGranted
893	Risk-free interest rate	Concept (Percent)	For Period		ifrs-full:DescriptionOfRiskFreeInterestRateShareOptionsGranted
894	Share price	Concept (Monetary)	For Period		ifrs-full:ExercisePriceShareOptionsGranted
895	Forfeiture rate	Concept (Percent)	For Period		ctst:DescriptionOfOptionForfeitureRateOptionGranted
896	Expected life of options (years)	Concept (Decimal)	For Period		ifrs-full:DescriptionOfOptionLifeShareOptionsGranted
897	079 - Disclosure - COMMITMENTS (Details)	Network	*	*	http://canntrust.ca/role/CommitmentsDetails
898	Commitment [Table]	Table	*	*	ctst:CommitmentTable
899	Maturity [axis]	Axis			ifrs-full:MaturityAxis
900	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
901	2019	Member			ctst:CurrentYearMember
902	2020	Member			ifrs-full:LaterThanOneYearAndNotLaterThanTwoYearsMember
903	2021	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
904	2022	Member			ifrs-full:LaterThanThreeYearsAndNotLaterThanFourYearsMember
905	2023	Member			ifrs-full:LaterThanFourYearsAndNotLaterThanFiveYearsMember
906	Beyond	Member			ifrs-full:LaterThanFiveYearsAndNotLaterThanTenYearsMember
907	Commitment [Line Items]	LineItems			ctst:CommitmentLineItems
908	Leases	Concept (Monetary)	As Of	Credit	ifrs-full:LeaseLiabilities
909	Marketing	Concept (Monetary)	For Period	Debit	ctst:CommitmentMarketingExpenses
910	Total	Concept (Monetary)	As Of	Credit	ifrs-full:CapitalCommitments
911	080 - Disclosure - COMMITMENTS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/CommitmentsDetailTextuals
912	Implied Table	Table	*	*	implied:Table
913	Commitments and Contingencies Disclosure [Abstract]	Abstract			us-gaap:CommitmentsAndContingenciesDisclosureAbstract
914	Area of Greenhouse	Concept (Integer)	For Period		ctst:DerivedHeatAndPower
915	Aggregated lease and maintenance payments	Concept (Monetary)	As Of	Credit	ifrs-full:MinimumLeasePaymentsPayableUnderNoncancellableOperatingLease
916	Term for aggregated lease and maintenance payments	Concept (Decimal)	For Period		ctst:TermOfFuturePayments
917	081 - Disclosure - RELATED PARTY TRANSACTIONS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/RELATEDPARTYTRANSACTIONSDetails
918	Disclosure of transactions between related parties [table]	Table	*	*	ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesTable
919	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
920	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
921	Stenocare	Member			ctst:StenocareMember
922	O'Cannabis	Member			ctst:OCannabisMember
923	Disclosure of transactions between related parties [line items]	LineItems			ifrs-full:DisclosureOfTransactionsBetweenRelatedPartiesLineItems
924	Compensation of key management and directors	Concept (Monetary)	For Period	Debit	ifrs-full:KeyManagementPersonnelCompensation
925	Number of stock options issued to key management and directors	Concept (Shares)	For Period		ctst:KeyManagementPersonnelCompensationStockOptionsIssued
926	Stock options issued to key management and directors	Concept (Monetary)	For Period	Debit	ctst:KeyManagementPersonnelCompensationStockOptionsValueIssued
927	Number of stock options exercised by key management and directors	Concept (Shares)	For Period		ctst:KeyManagementPersonnelCompensationStockOptionsExercised
928	Stock options exercised by key management and directors	Concept (Monetary)	For Period	Debit	ctst:KeyManagementPersonnelCompensationStockOptionsValueExercised
929	Number of stock options forfeited by key management and directors	Concept (Shares)	For Period		ctst:KeyManagementPersonnelCompensationStockOptionsForfeited
930	Stock options forfeited by key management and directors	Concept (Monetary)	For Period	Debit	ctst:KeyManagementPersonnelCompensationStockOptionsValueForfeited
931	Management fees to related parties	Concept (Monetary)	For Period	Debit	ctst:ManagementFeesToRelatedParties
932	Amount unpaid and included in accounts payable	Concept (Monetary)	As Of	Credit	ifrs-full:AmountsPayableRelatedPartyTransactions
933	Legal fees to related party	Concept (Monetary)	For Period	Debit	ctst:LegalFeesToRelatedParties
934	Sale of cannabis extracts	Concept (Monetary)	For Period	Credit	ifrs-full:SalesOfPropertyAndOtherAssetsRelatedPartyTransactions
935	Expenses incurred for services provided by related party	Concept (Monetary)	For Period	Debit	ctst:ExpensesIncurredForServicesProvidedByRelatedParty
936	082 - Disclosure - INVESTMENTS (Details)	Network	*	*	http://canntrust.ca/role/INVESTMENTSDetails
937	Investments In Subsidiaries Joint Ventures And Associates [Table]	Table	*	*	ctst:InvestmentsInSubsidiariesJointVenturesAndAssociatesTable
938	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
939	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
940	CCTP	Member			ctst:CannabisCoffeeAndTeaPodCompanyLimitedMember
941	GWAH	Member			ctst:GreyWolfAnimalHealthMember
942	O'Cannabis	Member			ctst:OCannabisMember
943	Stenocare	Member			ctst:StenocareMember
944	NAC	Member			ctst:NationalAccessCannabisCorpMember
945	Cannatrek	Member			ctst:CannatrekLtdMember
946	Investments In Subsidiaries Joint Ventures And Associates [Line Items]	LineItems			ctst:InvestmentsInSubsidiariesJointVenturesAndAssociatesLineItems
947	Investment Balance at December 31, 2017	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
948	Investment and Advances	Concept (Monetary)	For Period	Credit	ifrs-full:CashAdvancesAndLoansMadeToOtherPartiesClassifiedAsInvestingActivities
949	Share of Net Loss	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
950	Changes in Fair value	Concept (Monetary)	For Period	Debit	ifrs-full:IncreaseDecreaseInFairValueMeasurementAssets
951	Investment Balance at December 31, 2018	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
952	083 - Disclosure - INVESTMENTS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/INVESTMENTSDetails1
953	Investments In Subsidiaries Joint Ventures And Associates [Table]	Table	*	*	ctst:InvestmentsInSubsidiariesJointVenturesAndAssociatesTable
954	Categories of related parties [axis]	Axis			ifrs-full:CategoriesOfRelatedPartiesAxis
955	Entity's total for related parties [member]	Member			ifrs-full:EntitysTotalForRelatedPartiesMember
956	CCTP	Member			ctst:CannabisCoffeeAndTeaPodCompanyLimitedMember
957	GWAH	Member			ctst:GreyWolfAnimalHealthMember
958	O'Cannabis	Member			ctst:OCannabisMember
959	Stenocare	Member			ctst:StenocareMember
960	NAC	Member			ctst:NationalAccessCannabisCorpMember
961	Cannatrek	Member			ctst:CannatrekLtdMember
962	Sale Of Stock [Axis]	Axis			ctst:SaleOfStockAxis
963	Sale Of Stock [Domain]	Member			ctst:SaleOfStockDomain
964	Initial public offering	Member			ctst:InitialPublicOfferingMember
965	Investments In Subsidiaries Joint Ventures And Associates [Line Items]	LineItems			ctst:InvestmentsInSubsidiariesJointVenturesAndAssociatesLineItems
966	Proportion of ownership interest in joint venture	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInJointVenture
967	Net loss and comprehensive loss after tax	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLoss
968	Company's share of net loss	Concept (Monetary)	For Period	Credit	ifrs-full:ShareOfProfitLossOfAssociatesAndJointVenturesAccountedForUsingEquityMethod
969	Investments accounted for using equity method	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentAccountedForUsingEquityMethod
970	Number of warrant exercisable	Concept (Shares)	As Of		ctst:NumberOfWarrantExercisable
971	Number of common shares purchased	Concept (Shares)	As Of		ctst:NumberOfCommonStockPurchased
972	Exercise price of warrants	Concept (Share)	As Of		ctst:ExercisePriceOfWarrants
973	Price per share of common stock purchased	Concept (Share)	As Of		ctst:PurchaseOfCommonSharesPricePerShare
974	Amount of common stock purchased	Concept (Monetary)	For Period	Credit	ifrs-full:PaymentsToAcquireOrRedeemEntitysShares
975	Investments in joint ventures	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInJointVentures
976	Proportion of ownership interest in associate	Concept (Percent)	For Period		ifrs-full:ProportionOfOwnershipInterestInAssociate
977	Decrease in ownership interest in associate	Concept (Percent)	For Period		ctst:DecreaseInOwnershipInterestInAssociate
978	Investments in subsidiaries, joint ventures and associates	Concept (Monetary)	As Of	Debit	ifrs-full:InvestmentsInSubsidiariesJointVenturesAndAssociates
979	Number of shares invested in partnership	Concept (Shares)	As Of		ctst:NumberOfSharesInvestedInPartnership
980	Additional investment achieving specific performance targets	Concept (Monetary)	As Of	Debit	ctst:AdditionalInvestmentAchievingSpecificPerformanceTargets
981	Percentage of outstanding commom stock owned	Concept (Percent)	As Of		ctst:PercentageOfOutstandingCommomStockOwned
982	Proportion of ownership interest in partnership	Concept (Percent)	For Period		ctst:ProportionOfOwnershipInterestInPartnership
983	Considerations paid allocated to common shares	Concept (Monetary)	For Period	Debit	ctst:ConsiderationsPaidForCommonShares
984	Considerations paid allocated to warrants	Concept (Monetary)	For Period	Debit	ctst:ConsiderationsPaidForWarrant
985	Number of share options received	Concept (Decimal)	As Of		ifrs-full:NumberOfOutstandingShareOptions
986	Options outstanding, exercise price per share	Concept (Monetary)	As Of		ifrs-full:WeightedAverageExercisePriceOfShareOptionsOutstandingInSharebasedPaymentArrangement
987	084 - Disclosure - INCOME TAXES (Details)	Network	*	*	http://canntrust.ca/role/INCOMETAXESDetails
988	Implied Table	Table	*	*	implied:Table
989	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
990	Current	Concept (Monetary)	For Period	Debit	ifrs-full:CurrentTaxExpenseIncomeAndAdjustmentsForCurrentTaxOfPriorPeriods
991	Deferred	Concept (Monetary)	For Period	Debit	ifrs-full:DeferredTaxExpenseIncome
992	Income tax provision	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
993	085 - Disclosure - INCOME TAXES (Details 1)	Network	*	*	http://canntrust.ca/role/INCOMETAXESDetails1
994	Implied Table	Table	*	*	implied:Table
995	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
996	(Loss) income before income taxes	Concept (Monetary)	For Period	Credit	ifrs-full:ProfitLossBeforeTax
997	Combined statutory tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
998	Theoretical tax recovery	Concept (Monetary)	For Period	Debit	ctst:TheoreticalTaxExpenseRecovery
999	Non-deductible expense:	Abstract			ctst:TaxEffectOfExpenseNotDeductibleAbstract
1000	Stock based compensation	Concept (Monetary)	For Period	Debit	ctst:TaxEffectOfExpenseNotDeductibleInDeterminingStockBasedCompensation
1001	Loss on equity accounted investments	Concept (Monetary)	For Period	Debit	ctst:TaxEffectOfLossOnEquityAccountedInvestments
1002	Meals and entertainment	Concept (Monetary)	For Period	Debit	ctst:TaxRateEffectOfMealsAndEntertainment
1003	Changes in unrecognized deferred tax assets	Concept (Monetary)	For Period	Debit	ctst:ChangeInUnrecognizedDeferredTaxAssets
1004	Prior year adjustment	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForDeferredTaxOfPriorPeriods
1005	Other	Concept (Monetary)	For Period	Debit	ifrs-full:OtherTaxEffectsForReconciliationBetweenAccountingProfitAndTaxExpenseIncome
1006	Income tax expense	Concept (Monetary)	For Period	Debit	ifrs-full:IncomeTaxExpenseContinuingOperations
1007	086 - Disclosure - INCOME TAXES (Details 2)	Network	*	*	http://canntrust.ca/role/INCOMETAXESDetails2
1008	Implied Table	Table	*	*	implied:Table
1009	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1010	Deferred tax assets	Abstract			ctst:DeferredTaxAssetsComponentsAbstract
1011	Non-capital losses carried forward	Concept (Monetary)	As Of	Debit	ctst:DeferredTaxAssetsNonCapitalLossCarryforwards
1012	Property, plant and equipment	Concept (Monetary)	As Of	Debit	ctst:DeferredTaxAssetsPropertyPlantsAndEquipment
1013	Investments	Concept (Monetary)	As Of	Debit	ctst:DeferredTaxAssetsInvestment
1014	Share issuance costs	Concept (Monetary)	As Of	Debit	ctst:DeferredTaxAssetsShareIssuanceCosts
1015	Deferred tax liabilities	Abstract			ctst:DeferredTaxLiabilitiesComponentsAbstract
1016	Inventory	Concept (Monetary)	As Of	Credit	ctst:DeferredTaxLiabilitiesInventories
1017	Biological assets	Concept (Monetary)	As Of	Credit	ctst:DeferredTaxLiabilitiesBiologicalAssets
1018	Net deferred tax liability	Concept (Monetary)	As Of	Credit	ifrs-full:DeferredTaxLiabilityAsset
1019	087 - Disclosure - INCOME TAXES (Details 3)	Network	*	*	http://canntrust.ca/role/INCOMETAXESDetails3
1020	Implied Table	Table	*	*	implied:Table
1021	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1022	Non-capital losses carried forward	Concept (Monetary)	As Of	Debit	ctst:NonCapitalLossesCarriedForwardDeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1023	Share issuance costs	Concept (Monetary)	As Of	Debit	ctst:ShareIssuanceCostsDeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1024	Deferred tax assets not recognized	Concept (Monetary)	As Of		ifrs-full:DeductibleTemporaryDifferencesForWhichNoDeferredTaxAssetIsRecognised
1025	088 - Disclosure - INCOME TAXES (Detail Textuals)	Network	*	*	http://canntrust.ca/role/IncomeTaxesDetailTextuals
1026	Implied Table	Table	*	*	implied:Table
1027	Major components of tax expense (income) [abstract]	Abstract			ifrs-full:MajorComponentsOfTaxExpenseIncomeAbstract
1028	Federal and provincial statutory income tax rate	Concept (Percent)	For Period		ifrs-full:ApplicableTaxRate
1029	Losses carried forward from prior years	Concept (Monetary)	For Period	Debit	ifrs-full:AdjustmentsForCurrentTaxOfPriorPeriod
1030	089 - Disclosure - FINANCIAL INSTRUMENTS (Details)	Network	*	*	http://canntrust.ca/role/FinancialInstrumentsDetails
1031	Disclosure of detailed information about financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
1032	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1033	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1034	Accounts payable and accrued liabilities	Member			ctst:AccountPayableAndAccruedLiabilitiesMember
1035	Mortgage	Member			ctst:MortgagePayableMember
1036	Promissory note	Member			ctst:PromissoryNoteMember
1037	Maturity [axis]	Axis			ifrs-full:MaturityAxis
1038	Aggregated time bands [member]	Member			ifrs-full:AggregatedTimeBandsMember
1039	Year 1	Member			ifrs-full:NotLaterThanOneYearMember
1040	Year 2-3	Member			ifrs-full:LaterThanTwoYearsAndNotLaterThanThreeYearsMember
1041	Years 4 and after	Member			ctst:LaterThanFourYearsMember
1042	Disclosure of detailed information about financial instruments [line items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1043	Contractual maturities of undiscounted cash flow	Concept (Monetary)	As Of	Credit	ctst:UndiscountedCashOutflowRequiredToRepurchaseDerecognisedFinancialAssetsOrLiabilities
1044	090 - Disclosure - FINANCIAL INSTRUMENTS (Details 1)	Network	*	*	http://canntrust.ca/role/FinancialInstrumentsDetails1
1045	Disclosure of detailed information about financial instruments [table]	Table	*	*	ifrs-full:DisclosureOfFinancialInstrumentsTable
1046	Classes of financial liabilities [axis]	Axis			ifrs-full:ClassesOfFinancialLiabilitiesAxis
1047	Financial liabilities, class [member]	Member			ifrs-full:FinancialLiabilitiesMember
1048	Mortgage	Member			ctst:MortgagePayableMember
1049	Measurement [axis]	Axis			ifrs-full:MeasurementAxis
1050	Aggregated measurement [member]	Member			ifrs-full:AggregatedMeasurementMember
1051	Fair Value	Member			ifrs-full:AtFairValueMember
1052	Disclosure of detailed information about financial instruments [line items]	LineItems			ifrs-full:DisclosureOfFinancialInstrumentsLineItems
1053	Mortgage	Concept (Monetary)	As Of	Credit	ifrs-full:SecuredBankLoansReceived
1054	091 - Disclosure - FINANCIAL INSTRUMENTS (Detail Textuals)	Network	*	*	http://canntrust.ca/role/FinancialInstrumentsDetailTextuals
1055	Implied Table	Table	*	*	implied:Table
1056	Disclosure of detailed information about financial instruments [abstract]	Abstract			ifrs-full:DisclosureOfFinancialInstrumentsAbstract
1057	Short term investments	Concept (Monetary)	As Of	Debit	ifrs-full:ShorttermInvestmentsClassifiedAsCashEquivalents
1058	Current liabilities	Concept (Monetary)	As Of	Credit	ifrs-full:CurrentLiabilities
1059	Values for cash, short-term investments, Harmonized sales tax recoverable and accounts receivable	Concept (Monetary)	As Of	Debit	ctst:CurrentAssetsIncludingCashShort-TermInvestmentsHarmonizedSalesTaxRecoverableAndAccountsReceivable
1060	Values for cash and cash equivalents, short-term investments, restricted cash and accounts receivable	Concept (Monetary)	As Of	Debit	ctst:CurrentAssetsIncludingCashAndCashEquivalentsShort-TermInvestmentsRestrictedCashAndAccountsReceivable
1061	092 - Disclosure - REVENUE (Details)	Network	*	*	http://canntrust.ca/role/RevenueDetails
1062	Disclosure of disaggregation of revenue from contracts with customers [table]	Table	*	*	ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersTable
1063	Types of customers [axis]	Axis			ifrs-full:TypesOfCustomersAxis
1064	Types of customers [member]	Member			ifrs-full:TypesOfCustomersMember
1065	Canadian Medical	Member			ctst:CanadianMedicalMember
1066	Wholesale	Member			ctst:WholesaleMember
1067	Products and services [axis]	Axis			ifrs-full:ProductsAndServicesAxis
1068	Products and services [member]	Member			ifrs-full:ProductsAndServicesMember
1069	Dried Cannabis	Member			ctst:DriedCannabisMember
1070	Extracts	Member			ctst:ExtractsMember
1071	Other	Member			ctst:OtherMember
1072	Disclosure of disaggregation of revenue from contracts with customers [line items]	LineItems			ifrs-full:DisclosureOfDisaggregationOfRevenueFromContractsWithCustomersLineItems
1073	Total	Concept (Monetary)	For Period	Credit	ifrs-full:RevenueFromContractsWithCustomers