| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary> |
| <Version> 3.20.2 </Version> |
| <ProcessingTime/> |
| <ReportFormat> html </ReportFormat> |
| <ContextCount> 417 </ContextCount> |
| <ElementCount> 430 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> true </FootnotesReported> |
| <SegmentCount> 97 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 5 </UnitCount> |
| <MyReports> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 101 - Document - Cover </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/Cover </Role> |
| | | <ShortName> Cover </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 1 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 103 - Statement - Condensed Consolidated Interim Balance Sheets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/StatementOfFinancialPositionClassified </Role> |
| | | <ShortName> Condensed Consolidated Interim Balance Sheets </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 2 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 104 - Statement - Condensed Consolidated Interim Balance Sheets (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/StatementOfFinancialPositionClassifiedParenthetical </Role> |
| | | <ShortName> Condensed Consolidated Interim Balance Sheets (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 3 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 105 - Statement - Condensed Consolidated Interim Statements of Operations </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/StatementOfIncomeAlternative </Role> |
| | | <ShortName> Condensed Consolidated Interim Statements of Operations </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 4 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 106 - Statement - Condensed Consolidated Interim Statements of Stockholders' Equity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/StatementOfShareholdersEquityAndOtherComprehensiveIncome </Role> |
| | | <ShortName> Condensed Consolidated Interim Statements of Stockholders' Equity </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 5 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 107 - Statement - Condensed Consolidated Interim Statements of Cash Flows </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/StatementOfCashFlowsIndirect </Role> |
| | | <ShortName> Condensed Consolidated Interim Statements of Cash Flows </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 6 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 108 - Disclosure - Nature of Operations, Corporate History, and Going Concern </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsNatureOfOperations </Role> |
| | | <ShortName> Nature of Operations, Corporate History, and Going Concern </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 7 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 109 - Disclosure - Significant accounting policies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock </Role> |
| | | <ShortName> Significant accounting policies </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 8 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 110 - Disclosure - Valent Technologies LLC agreements </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsValentTechnologiesLlcTextBlock </Role> |
| | | <ShortName> Valent Technologies LLC agreements </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 9 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 111 - Disclosure - Derivative liabilities </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsDerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock </Role> |
| | | <ShortName> Derivative liabilities </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 10 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 112 - Disclosure - Stockholders' equity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlock </Role> |
| | | <ShortName> Stockholders' equity </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 11 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 113 - Disclosure - Related party transactions </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsRelatedPartyTransactionsDisclosureTextBlock </Role> |
| | | <ShortName> Related party transactions </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 12 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 114 - Disclosure - Current and deferred income taxes </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock </Role> |
| | | <ShortName> Current and deferred income taxes </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 13 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 115 - Disclosure - Commitments and contingencies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsCommitmentsAndContingenciesDisclosureTextBlock </Role> |
| | | <ShortName> Commitments and contingencies </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 14 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 116 - Disclosure - Supplementary statement of cash flows information </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsCashFlowSupplementalDisclosuresTextBlock </Role> |
| | | <ShortName> Supplementary statement of cash flows information </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 15 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 117 - Disclosure - Financial risk management </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsConcentrationRiskDisclosureTextBlock </Role> |
| | | <ShortName> Financial risk management </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 16 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 118 - Disclosure - Subsequent events </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsSubsequentEventsTextBlock </Role> |
| | | <ShortName> Subsequent events </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 17 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 119 - Disclosure - Financial instruments </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsFinancialInstrumentsDisclosureTextBlock </Role> |
| | | <ShortName> Financial instruments </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 18 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 120 - Disclosure - Significant accounting policies (Policies) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlockPolicies </Role> |
| | | <ShortName> Significant accounting policies (Policies) </ShortName> |
| | | <MenuCategory> Policies </MenuCategory> |
| | | <Position> 19 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 121 - Disclosure - Significant accounting policies (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlockTables </Role> |
| | | <ShortName> Significant accounting policies (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsOrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureAndSignificantAccountingPoliciesTextBlock </ParentRole> |
| | | <Position> 20 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 122 - Disclosure - Derivative liabilities (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsDerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlockTables </Role> |
| | | <ShortName> Derivative liabilities (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsDerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock </ParentRole> |
| | | <Position> 21 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 123 - Disclosure - Stockholders' equity (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlockTables </Role> |
| | | <ShortName> Stockholders' equity (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlock </ParentRole> |
| | | <Position> 22 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 124 - Disclosure - Current and deferred income taxes (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlockTables </Role> |
| | | <ShortName> Current and deferred income taxes (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsIncomeTaxDisclosureTextBlock </ParentRole> |
| | | <Position> 23 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 125 - Disclosure - Supplementary statement of cash flows information (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsCashFlowSupplementalDisclosuresTextBlockTables </Role> |
| | | <ShortName> Supplementary statement of cash flows information (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsCashFlowSupplementalDisclosuresTextBlock </ParentRole> |
| | | <Position> 24 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 126 - Disclosure - Financial risk management (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsConcentrationRiskDisclosureTextBlockTables </Role> |
| | | <ShortName> Financial risk management (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsConcentrationRiskDisclosureTextBlock </ParentRole> |
| | | <Position> 25 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 127 - Disclosure - Nature of Operations, Corporate History, and Going Concern (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureNatureOfOperationsCorporateHistoryAndGoingConcern </Role> |
| | | <ShortName> Nature of Operations, Corporate History, and Going Concern (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsNatureOfOperations </ParentRole> |
| | | <Position> 26 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 128 - Disclosure - Significant Accounting Policies (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureSignificantAccountingPolicies </Role> |
| | | <ShortName> Significant Accounting Policies (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 27 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 129 - Disclosure - Significant accounting policies - Schedule of derivative liabilities under the fair value hierarchy (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureSignificantAccountingPoliciesScheduleOfDerivativeLiabilitiesUnderTheFairValueHierarchy </Role> |
| | | <ShortName> Significant accounting policies - Schedule of derivative liabilities under the fair value hierarchy (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 28 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 130 - Disclosure - Valent Technologies LLC Agreements - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureValentTechnologiesLLCAgreementsAdditionalInformation </Role> |
| | | <ShortName> Valent Technologies LLC Agreements - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 29 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 131 - Disclosure - Derivative Liabilities - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureDerivativeLiabilitiesAdditionalInformation </Role> |
| | | <ShortName> Derivative Liabilities - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 30 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 132 - Disclosure - Derivative Liabilities - Schedule of derivative liabilities (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureDerivativeLiabilitiesScheduleOfDerivativeLiabilities </Role> |
| | | <ShortName> Derivative Liabilities - Schedule of derivative liabilities (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 31 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 133 - Disclosure - Derivative Liabilities - Schedule of derivative liabilities 1 (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureDerivativeLiabilitiesScheduleOfDerivativeLiabilities1 </Role> |
| | | <ShortName> Derivative Liabilities - Schedule of derivative liabilities 1 (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 32 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 134 - Disclosure - Stockholders' Equity (Deficiency) (Textual) (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencyTextual </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency) (Textual) (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 33 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 135 - Disclosure - Stockholders' Equity (Deficiency) (Textual 2) (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencyTextual2 </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency) (Textual 2) (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 34 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 136 - Disclosure - Stockholders' Equity (Deficiency) (Textual 3) (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencyTextual3 </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency) (Textual 3) (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 35 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 137 - Disclosure - Stockholders' equity (deficiency) - Schedule of outstanding under the legacy plan (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquitydeficiencyScheduleOfOutstandingUnderTheLegacyPlan </Role> |
| | | <ShortName> Stockholders' equity (deficiency) - Schedule of outstanding under the legacy plan (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlockTables </ParentRole> |
| | | <Position> 36 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 138 - Disclosure - Stockholders' Equity (Deficiency) - Schedule of valuation assumptions using a Black-Scholes pricing model (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencyScheduleOfValuationAssumptionsUsingABlackScholesPricingModel </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency) - Schedule of valuation assumptions using a Black-Scholes pricing model (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 37 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 139 - Disclosure - Stockholders' equity (deficiency) - Summary of stock options currently outstanding and exercisable (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquitydeficiencySummaryOfStockOptionsCurrentlyOutstandingAndExercisable </Role> |
| | | <ShortName> Stockholders' equity (deficiency) - Summary of stock options currently outstanding and exercisable (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlockTables </ParentRole> |
| | | <Position> 38 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R39.htm </HtmlFileName> |
| | | <LongName> 140 - Disclosure - Stockholders' Equity (Deficiency) - (Textual 4) (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencyTextual4 </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency) - (Textual 4) (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 39 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 141 - Disclosure - Stockholders' equity (deficiency) - Schedule of stock-based compensation expense (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquitydeficiencyScheduleOfStockbasedCompensationExpense </Role> |
| | | <ShortName> Stockholders' equity (deficiency) - Schedule of stock-based compensation expense (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlockTables </ParentRole> |
| | | <Position> 40 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 142 - Disclosure - Stockholders' equity (deficiency) - Summary of unvested stock options (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquitydeficiencySummaryOfUnvestedStockOptions </Role> |
| | | <ShortName> Stockholders' equity (deficiency) - Summary of unvested stock options (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.delmarpharma.com/taxonomy/role/NotesToFinancialStatementsStockholdersEquityNoteDisclosureTextBlockTables </ParentRole> |
| | | <Position> 41 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 143 - Disclosure - Stockholders' Equity (Deficiency) - Schedule of warrants (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencyScheduleOfWarrants </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency) - Schedule of warrants (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 42 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 144 - Disclosure - Stockholders' Equity (Deficiency) - Schedule of warrants (Parenthetical) (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencyScheduleOfWarrantsParenthetical </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency) - Schedule of warrants (Parenthetical) (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 43 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 145 - Disclosure - Stockholders' Equity (Deficiency - Summary of changes in outstanding warrants (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencySummaryOfChangesInOutstandingWarrants </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency - Summary of changes in outstanding warrants (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 44 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 146 - Disclosure - Stockholders' Equity (Deficiency) - Summary of outstanding warrants (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityDeficiencySummaryOfOutstandingWarrants </Role> |
| | | <ShortName> Stockholders' Equity (Deficiency) - Summary of outstanding warrants (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 45 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R46.htm </HtmlFileName> |
| | | <LongName> 147 - Disclosure - Related Party Transactions - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformation </Role> |
| | | <ShortName> Related Party Transactions - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 46 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R47.htm </HtmlFileName> |
| | | <LongName> 148 - Disclosure - Current and Deferred Income Taxes - Components of future tax assets and deferred tax liabilities (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureCurrentAndDeferredIncomeTaxesComponentsOfFutureTaxAssetsAndDeferredTaxLiabilities </Role> |
| | | <ShortName> Current and Deferred Income Taxes - Components of future tax assets and deferred tax liabilities (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 47 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R48.htm </HtmlFileName> |
| | | <LongName> 149 - Disclosure - Current and Deferred Income Taxes - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureCurrentAndDeferredIncomeTaxesAdditionalInformation </Role> |
| | | <ShortName> Current and Deferred Income Taxes - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 48 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R49.htm </HtmlFileName> |
| | | <LongName> 150 - Disclosure - Current and Deferred Income Taxes - Schedule of difference between income tax rate and statutory income tax rate (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureCurrentAndDeferredIncomeTaxesScheduleOfDifferenceBetweenIncomeTaxRateAndStatutoryIncomeTaxRate </Role> |
| | | <ShortName> Current and Deferred Income Taxes - Schedule of difference between income tax rate and statutory income tax rate (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 49 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R50.htm </HtmlFileName> |
| | | <LongName> 151 - Disclosure - Commitments and Contingencies - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformation </Role> |
| | | <ShortName> Commitments and Contingencies - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 50 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R51.htm </HtmlFileName> |
| | | <LongName> 152 - Disclosure - Supplementary Statement of Cash Flows Information - Schedule of supplementary statement of cash flows information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureSupplementaryStatementOfCashFlowsInformationScheduleOfSupplementaryStatementOfCashFlowsInformation </Role> |
| | | <ShortName> Supplementary Statement of Cash Flows Information - Schedule of supplementary statement of cash flows information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 51 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R52.htm </HtmlFileName> |
| | | <LongName> 153 - Disclosure - Financial Risk Management - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureFinancialRiskManagementAdditionalInformation </Role> |
| | | <ShortName> Financial Risk Management - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 52 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R53.htm </HtmlFileName> |
| | | <LongName> 154 - Disclosure - Financial Risk Management - Schedule of balances in foreign currencies (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureFinancialRiskManagementScheduleOfBalancesInForeignCurrencies </Role> |
| | | <ShortName> Financial Risk Management - Schedule of balances in foreign currencies (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 53 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R54.htm </HtmlFileName> |
| | | <LongName> 155 - Disclosure - Financial Risk Management - Schedule of fair value of off-balance sheet risks (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureFinancialRiskManagementScheduleOfFairValueOfOffbalanceSheetRisks </Role> |
| | | <ShortName> Financial Risk Management - Schedule of fair value of off-balance sheet risks (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 54 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R55.htm </HtmlFileName> |
| | | <LongName> 156 - Disclosure - Subsequent Events - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureSubsequentEventsAdditionalInformation </Role> |
| | | <ShortName> Subsequent Events - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 55 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R56.htm </HtmlFileName> |
| | | <LongName> 157 - Disclosure - Stockholders' Equity - Schedule of Conversion of Series B Preferred stock to common stock (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureStockholdersEquityScheduleOfConversionOfSeriesBPreferredStockToCommonStock </Role> |
| | | <ShortName> Stockholders' Equity - Schedule of Conversion of Series B Preferred stock to common stock (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 56 </Position> |
| | | </Report> |
| | <Report instance="dmpi-20200331.xml"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R57.htm </HtmlFileName> |
| | | <LongName> 158 - Disclosure - Financial Instruments - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.delmarpharma.com/taxonomy/role/DisclosureFinancialInstrumentsAdditionalInformation </Role> |
| | | <ShortName> Financial Instruments - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 57 </Position> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <InputFiles> |
| | <File> dmpi-20200331.xml </File> |
| | <File> dmpi-20200331.xsd </File> |
| | <File> dmpi-20200331_cal.xml </File> |
| | <File> dmpi-20200331_def.xml </File> |
| | <File> dmpi-20200331_lab.xml </File> |
| | <File> dmpi-20200331_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies> |
| | <BaseTaxonomy> http://fasb.org/srt/2019-01-31 </BaseTaxonomy> |
| | <BaseTaxonomy> http://xbrl.sec.gov/country/2017-01-31 </BaseTaxonomy> |
| | <BaseTaxonomy> http://fasb.org/us-gaap/2019-01-31 </BaseTaxonomy> |
| | <BaseTaxonomy> http://xbrl.sec.gov/dei/2019-01-31 </BaseTaxonomy> |
| | </BaseTaxonomies> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |