3.20.2 html 47 220 1 true 19 0 false 5 false false R1.htm 00090 - Document - Document and Entity Information Sheet http://www.qellspac.com/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00100 - Statement - UNAUDITED CONDENSED BALANCE SHEET Sheet http://www.qellspac.com/role/StatementUnauditedCondensedBalanceSheet UNAUDITED CONDENSED BALANCE SHEET Statements 2 false false R3.htm 00105 - Statement - UNAUDITED CONDENSED BALANCE SHEET (Parenthetical) Sheet http://www.qellspac.com/role/StatementUnauditedCondensedBalanceSheetParenthetical UNAUDITED CONDENSED BALANCE SHEET (Parenthetical) Statements 3 false false R4.htm 00200 - Statement - UNAUDITED CONDENSED STATEMENT OF OPERATIONS Sheet http://www.qellspac.com/role/StatementUnauditedCondensedStatementOfOperations UNAUDITED CONDENSED STATEMENT OF OPERATIONS Statements 4 false false R5.htm 00205 - Statement - UNAUDITED CONDENSED STATEMENT OF OPERATIONS (Parenthetical) Sheet http://www.qellspac.com/role/StatementUnauditedCondensedStatementOfOperationsParenthetical UNAUDITED CONDENSED STATEMENT OF OPERATIONS (Parenthetical) Statements 5 false false R6.htm 00300 - Statement - UNAUDITED CONDENSED STATEMENT OF CHANGES IN SHAREHOLDERS' DEFICIT Sheet http://www.qellspac.com/role/StatementUnauditedCondensedStatementOfChangesInShareholdersDeficit UNAUDITED CONDENSED STATEMENT OF CHANGES IN SHAREHOLDERS' DEFICIT Statements 6 false false R7.htm 00305 - Statement - UNAUDITED CONDENSED STATEMENT OF CHANGES IN SHAREHOLDERS' DEFICIT (Parenthetical) Sheet http://www.qellspac.com/role/StatementUnauditedCondensedStatementOfChangesInShareholdersDeficitParenthetical UNAUDITED CONDENSED STATEMENT OF CHANGES IN SHAREHOLDERS' DEFICIT (Parenthetical) Statements 7 false false R8.htm 00400 - Statement - UNAUDITED CONDENSED STATEMENT OF CASH FLOWS Sheet http://www.qellspac.com/role/StatementUnauditedCondensedStatementOfCashFlows UNAUDITED CONDENSED STATEMENT OF CASH FLOWS Statements 8 false false R9.htm 10101 - Disclosure - Description of organization, business operations and basis of presentation Sheet http://www.qellspac.com/role/DisclosureDescriptionOfOrganizationBusinessOperationsAndBasisOfPresentation Description of organization, business operations and basis of presentation Notes 9 false false R10.htm 10201 - Disclosure - Summary of significant accounting policies Sheet http://www.qellspac.com/role/DisclosureSummaryOfSignificantAccountingPolicies Summary of significant accounting policies Notes 10 false false R11.htm 10301 - Disclosure - Initial Public Offering Sheet http://www.qellspac.com/role/DisclosureInitialPublicOffering Initial Public Offering Notes 11 false false R12.htm 10401 - Disclosure - Related party transactions Sheet http://www.qellspac.com/role/DisclosureRelatedPartyTransactions Related party transactions Notes 12 false false R13.htm 10501 - Disclosure - Commitments & contingencies Sheet http://www.qellspac.com/role/DisclosureCommitmentsContingencies Commitments & contingencies Notes 13 false false R14.htm 10601 - Disclosure - Shareholders' deficit Sheet http://www.qellspac.com/role/DisclosureShareholdersDeficit Shareholders' deficit Notes 14 false false R15.htm 10701 - Disclosure - Subsequent events Sheet http://www.qellspac.com/role/DisclosureSubsequentEvents Subsequent events Notes 15 false false R16.htm 20202 - Disclosure - Summary of significant accounting policies (Policies) Sheet http://www.qellspac.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of significant accounting policies (Policies) Policies 16 false false R17.htm 40101 - Disclosure - Description of organization, business operations and basis of presentation - Additional Information (Details) Sheet http://www.qellspac.com/role/DisclosureDescriptionOfOrganizationBusinessOperationsAndBasisOfPresentationAdditionalInformationDetails Description of organization, business operations and basis of presentation - Additional Information (Details) Details 17 false false R18.htm 40201 - Disclosure - Summary of significant accounting policies (Details) Sheet http://www.qellspac.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails Summary of significant accounting policies (Details) Details http://www.qellspac.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies 18 false false R19.htm 40301 - Disclosure - Initial Public Offering (Details) Sheet http://www.qellspac.com/role/DisclosureInitialPublicOfferingDetails Initial Public Offering (Details) Details http://www.qellspac.com/role/DisclosureInitialPublicOffering 19 false false R20.htm 40401 - Disclosure - Related party transactions - Founder Shares (Details) Sheet http://www.qellspac.com/role/DisclosureRelatedPartyTransactionsFounderSharesDetails Related party transactions - Founder Shares (Details) Details 20 false false R21.htm 40402 - Disclosure - Related party transactions - Additional information (Details) Sheet http://www.qellspac.com/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetails Related party transactions - Additional information (Details) Details 21 false false R22.htm 40501 - Disclosure - Commitments & contingencies - Additional information (Details) Sheet http://www.qellspac.com/role/DisclosureCommitmentsContingenciesAdditionalInformationDetails Commitments & contingencies - Additional information (Details) Details 22 false false R23.htm 40601 - Disclosure - Shareholders' deficit (Details) Sheet http://www.qellspac.com/role/DisclosureShareholdersDeficitDetails Shareholders' deficit (Details) Details http://www.qellspac.com/role/DisclosureShareholdersDeficit 23 false false R24.htm 40603 - Disclosure - Shareholders' deficit - Warrants (Details) Sheet http://www.qellspac.com/role/DisclosureShareholdersDeficitWarrantsDetails Shareholders' deficit - Warrants (Details) Details 24 false false All Reports Book All Reports qellu-20200930.xml qellu-20200930.xsd qellu-20200930_cal.xml qellu-20200930_def.xml qellu-20200930_lab.xml qellu-20200930_pre.xml http://fasb.org/us-gaap/2020-01-31 http://xbrl.sec.gov/dei/2020-01-31 http://fasb.org/srt/2020-01-31 true true