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Financial instruments - Narrative (Details) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 17, 2021 USD ($) shares | Dec. 31, 2022 USD ($) $ / $ | Dec. 31, 2021 USD ($) | Dec. 31, 2022 CAD ($) $ / $ | Jun. 16, 2021 USD ($)
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Investment income |  | $ 19,609,000 | $ 3,743,000 |  |
Mark-to-market gain (loss) on financial assets |  | (16,877,000) | (9,024,000) |  |
Impairment loss on trade receivables |  | 73,000 | 54,000 |  |
Net impairment loss on trade receivables |  | 73,000 | 54,000 |  |
Impairment loss allowance |  | 0 | 0 |  |
Green Hydrogen |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Mark-to-market gain (loss) on financial assets |  | 15,000 | 1,422,000 |  |
Forsee Power |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Mark-to-market gain (loss) on financial assets |  | (16,877,000) | (9,024,000) |  |
Ballard Power Systems Europe A/S |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Number of shares received in sale of stock transaction (in shares) | shares | 259,551 |  |  |  |
Ballard Power Systems Europe A/S | Green Hydrogen |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Proceeds from sales of investment |  | $ 1,010,000 | $ 336,000 |  |
Currency risk |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Exposure to risk holding Canadian denominated cash and cash equivalents, percentage (up to) |  | 100.00% |  |  |
Exposure to risk holding Canadian dollar net expenditures, percentage (up to) |  | 50.00% |  |  |
Average price of hedging instrument (CDN per USD) |  | 1.31 |  | 1.31 |
Reasonably possible change in risk variable, percent |  | 10.00% |  | 10.00% |
Increase in the corresponding risk variable on income |  | $ 8,361,000 |  |  |
Interest rate risk |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Reasonably possible change in risk variable, percent |  | 1.00% |  | 1.00% |
Decrease in the corresponding risk variable on investment income |  | $ 9,127,700 |  |  |
Equity investments | Ballard Power Systems Europe A/S |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Current investments | $ 1,681,000 |  |  |  | $ 5,000
Cash and cash equivalents | Currency risk |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Risk exposure associated with instruments sharing characteristic |  |  |  | $ 75,206,000 |
Foreign exchange contracts | Currency risk |  |  |  |  |
Disclosure of nature and extent of risks arising from financial instruments [line items] |  |  |  |  |
Risk exposure associated with instruments sharing characteristic |  |  |  | $ 38,000,000 |

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