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v3.22.4

Subsequent Events (Narrative) (Details) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
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Dec. 09, 2022 USD ($) $ / shares $ / Unit shares | Mar. 11, 2022 CAD ($) | Apr. 05, 2021 CAD ($) $ / shares shares | Dec. 31, 2022 CAD ($) | Dec. 31, 2022 USD ($) | Oct. 28, 2022 | Apr. 30, 2021 CAD ($) $ / Unit shares | Apr. 29, 2021 CAD ($) shares | Jan. 31, 2021 | Dec. 31, 2020 CAD ($) | May 31, 2020 CAD ($) $ / shares | Mar. 31, 2020 CAD ($) | Sep. 30, 2020 CAD ($) $ / shares shares | Dec. 13, 2022 CAD ($) shares | Dec. 13, 2022 USD ($) shares | Sep. 30, 2022 CAD ($) shares | Sep. 30, 2022 USD ($) | Sep. 30, 2021 CAD ($) shares | Dec. 31, 2019 CAD ($) shares | Dec. 31, 2018 CAD ($) $ / shares shares | Aug. 25, 2022 USD ($) | Sep. 17, 2020 shares | Sep. 30, 2019 CAD ($) shares
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of reverse stock split |  |  |  |  |  | 1-for-70 Reverse Split |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  |  |  |  |  | $ 32,273 |  |  | $ 2,278,774 |  | $ 53,251 | $ 0 |  |  |  |
Maximum royalty payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50,000 |  |  |  |
Fair value of shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,374,563 |  |  | $ 19,496,640 |  | $ 17,215,068 | $ 2,284,353 | $ 200 |  |  | $ 2,284,353
Number of shares outstanding | shares |  |  |  |  |  |  |  |  |  |  |  |  | 589,518 |  |  | 773,225 |  | 699,511 | 383,996 | 3 |  | 589,517 | 383,996
Issue price per share | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 31.5 |  |  |  |  |  |  |  |  | $ 66.67 |  |  |
Share offering costs |  |  |  |  |  |  |  |  |  |  | $ 58,065 | $ 45,283 | $ 699,886 |  |  | $ 33,880 |  | $ 606,622 |  |  |  |  |
Repayment of loan |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  | 0 |  | 306,000 | $ 10,747 |  |  |  |
US public offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units issued | shares | 2,500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue price per unit | $ / Unit | 4.13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of units issued | (the "Unit"), consisting of one share of common stock and one warrant to purchase one share of common stock ("Warrant") |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants issued | $ / shares | $ 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pre-funded common share purchase warrants issued | shares | 199,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Warrants granted during period | shares | 375,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash commission | $ 835,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of gross proceeds offering | 7.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Underwriter warrants granted | shares | 134,950 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Underwriter warrants, percentage | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue price per share | $ / shares | $ 5.1625 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Canadian offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units issued | shares | 726,392 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue price per unit | $ / Unit | 4.13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of common share purchase warrant | each consisting of one common share and one warrant to purchase one common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Exercise price of warrants issued | $ / shares | $ 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash commission | $ 210,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of gross proceeds offering | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation options granted | shares | 50,848 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Compensation options, percentage | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue price per share | $ / shares | $ 4.13 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Brokered private placements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units issued | shares |  |  |  |  |  |  | 51,087 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of units issued |  |  |  |  |  |  | Each April 2021 Warrant is exercisable to acquire 1/70 of a common share at a price of $1.75 each (70 warrants for one common share) for a period of 24 months from the closing of the April 2021 Offering ("Closing Date"). If at any time after four (4) months and one (1) day following the Closing Date, the trading price of KWESST common stock on the TSX Venture Exchange is equal to or exceeds $210.00 for a period of 10 consecutive trading days, as evidenced by the price at the close of market, we will be entitled to notify the holders of the April 2021 Warrants of its intention to force the exercise of the April 2021 Warrants. Upon receipt of such notice, the holders of April 2021 Warrants shall have 30 days to exercise the April 2021 Warrants, failing which the April 2021 Warrants will automatically expire. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue price per share | $ / shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 49.01 |  |  |  |  |  |  |  |  |  |
Share offering costs |  |  |  |  |  |  | $ 630,680 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CEBA Term Loan program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of increase in loan |  |  |  |  |  |  |  |  |  | $ 20,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  |  | $ 60,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Period for interest free term loan |  |  |  |  |  |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of repayment of term loan |  |  |  |  |  |  |  |  |  | The CEBA Term Loan may be repaid at any time without notice or the payment of any penalty. If 75% of the CEBA Term Loan is repaid on or before December 31, 2022, the repayment of the remaining 25% shall be forgiven. If on December 31, 2022, KWESST exercises the option for a 3-year term extension, a 5% annual interest will be applied on the any balance remaining during the extension period. |  |  |  |  |  |  |  |  |  |  |  |  |
Repayment of loan |  |  |  | $ 30,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Low Energy Cartridge technology from DEFSEC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued to acquire technology | shares |  |  |  |  |  |  |  | 14,286 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of warrants issued to acquire technology | shares |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of exercise price for warrants issued |  |  |  |  |  |  |  | $0.70 per 1/70 of a common share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of vesting percentage of warrants |  |  |  |  |  |  |  | 25% vesting on the first anniversary of the closing of the LEC Technology acquisition and 25% per annum thereafter. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of royalty on annual sales |  |  |  |  |  |  |  | 7.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum royalty payments |  |  |  |  |  |  |  | $ 10,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amended and restated licensing agreement with AerialX [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares issued | shares |  |  | 1,429 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue price per share | $ / shares |  |  | $ 95.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of shares |  |  | $ 137,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsequent events [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuing units | $ 14,145,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of shares |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,374,563 |  |  |  |  | $ 17,215,068 |  |  |  |  |
Number of shares outstanding | shares |  |  |  |  |  |  |  |  |  |  |  |  | 589,518 |  |  |  |  | 699,511 |  |  |  |  |
Share offering costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,300,000 | $ 839,679 |  |  |  |  |
Share offering costs deferred |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 628,262 |  |  |  |  |  |  |
Number of units issued to settle loan | shares |  |  |  |  |  |  |  |  |  |  |  |  |  | 56,141 | 56,141 |  |  |  |  |  |  |  |
Subsequent events [Member] | Brokered private placements [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of units issued | shares |  |  |  |  |  |  | 51,087 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issue price per unit | $ / Unit |  |  |  |  |  |  | 87.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of common share purchase warrant |  |  |  |  |  |  | Each issued unit is comprised of one common share of the Company and seventy common share purchase warrant. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from issuing units |  |  |  |  |  |  | $ 4,470,071 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Description of exercise price for warrants issued |  |  |  |  |  |  | 1/70 of a common share at a price of $1.75 each |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of warrants per unit issued | shares |  |  |  |  |  |  | 70 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
March 2022 Loan [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  | $ 2,000,000 |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  | 1,764,630 |  | 0 |  |  |  |  |
Share offering costs |  | $ 16,581 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
March 2022 Loan [Member] | Subsequent events [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt settled with issuance of units |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 12,000 |  |  |  |  |  |  |  |  |
Repayment of loan |  |  |  | $ 1,997,435 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
August 2022 Loans [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  | $ 435,348 |  | $ 0 |  |  | $ 400,000 |  |
August 2022 Loans [Member] | Subsequent events [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt settled with issuance of units |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 223,321 |  |  |  |  |  |  |  |
Repayment of loan |  |  |  |  | $ 223,321 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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Data Type: | srt-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of maximum royalty payments. + References No definition available. + Details
Name: | kwe_MaximumRoyaltyPayments
Namespace Prefix: | kwe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents number of shares issued to acquire technology. + References No definition available. + Details
Name: | kwe_NumberOfSharesIssuedToAcquireTechnology
Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents number of units issued. + References No definition available. + Details
Name: | kwe_NumberOfUnitsIssued
Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents number of units issued to settled loan. + References No definition available. + Details
Name: | kwe_NumberOfUnitsIssuedToSettleLoan
Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents number of warrants issued to acquire technology. + References No definition available. + Details
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Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents number of warrants per unit issued. + References No definition available. + Details
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Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Definition Represents percentage of gross proceeds offering. + References No definition available. + Details
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Namespace Prefix: | kwe_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage of royalty on annual sales. + References No definition available. + Details
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Namespace Prefix: | kwe_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Period for interest free term loan. + References No definition available. + Details
Name: | kwe_PeriodForInterestFreeTermLoan
Namespace Prefix: | kwe_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents pre-funded common share purchase warrants issued. + References No definition available. + Details
Name: | kwe_PreFundedCommonSharePurchaseWarrantsIssued
Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents amount of share offering costs deferred. + References No definition available. + Details
Name: | kwe_ShareOfferingCostsDeferred
Namespace Prefix: | kwe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Represents shares issued for licensing agreement. + References No definition available. + Details
Name: | kwe_StockIssuedDuringPeriodSharesForLicensingAgreement
Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents amount of shares issued. + References No definition available. + Details
Name: | kwe_StockIssuedDuringPeriodValueForLicensingAgreement
Namespace Prefix: | kwe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Description of repayment of term loan. + References No definition available. + Details
Name: | kwe_TermLoanRepaymentDescription
Namespace Prefix: | kwe_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the underwriter warrants granted. + References No definition available. + Details
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Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents percentage of underwriter warrants. + References No definition available. + Details
Name: | kwe_UnderwriterWarrantsPercentage
Namespace Prefix: | kwe_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents warrants granted during period. + References No definition available. + Details
Name: | kwe_WarrantsGrantedDuringPeriod
Namespace Prefix: | kwe_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | kwe_SaleOfStocksNameOfTransactionAxis=kwe_USPublicOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | kwe_SaleOfStocksNameOfTransactionAxis=kwe_CanadianOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | kwe_SaleOfStocksNameOfTransactionAxis=kwe_BrokeredPrivatePlacementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=kwe_LowEnergyCartridgeTechnologyFromDefsecMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=kwe_AmendedAndRestatedLicensingAgreementWithAerialxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=kwe_SubsequentEventsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_BorrowingsByNameAxis=kwe_March2022LoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_BorrowingsByNameAxis=kwe_August2022LoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |