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Trade and other receivables - Schedule of unbilled trade and other receivables (Details) - CAD ($) | 12 Months Ended
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Sep. 30, 2022 | Sep. 30, 2021
Trade and other receivables [abstract] |  |
Balance, beginning of year | $ 308,728 | $ 0
Unbilled Receivables, decrease from revenue billed | (308,728) |
Revenue in excess of billings, net of amounts transferred to trade accounts receivable | 8,881 | 308,728
Amounts written off | 0 | 0
Balance, end of year | 8,881 | 308,728
Current | 8,881 | 308,728
Non-current | $ 0 | $ 0

X
- Definition The amount of assets representing income that has been earned but is not yet a receivable, including contract assets. [Refer: Contract assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 78 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_AccruedIncomeIncludingContractAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of current accrued income including current contract assets. [Refer: Accrued income including contract assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 78 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of non-current accrued income including non-current contract assets. [Refer: Accrued income including contract assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 78 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_NoncurrentAccruedIncomeIncludingNoncurrentContractAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
Name: | ifrs-full_TradeAndOtherReceivablesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the amount of revenue in excess billings. + References No definition available. + Details
Name: | kwe_ExcessBillingRevenue
Namespace Prefix: | kwe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents the amount of Unbilled Receivables, decrease from revenue billed. + References No definition available. + Details
Name: | kwe_UnbilledReceivablesDecreaseFromRevenueBilled
Namespace Prefix: | kwe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Represents the amount of unbilled receivables written off. + References No definition available. + Details
Name: | kwe_UnbilledReceivablesWrittenOff
Namespace Prefix: | kwe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration