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Long term debt - Convertible debentures (Details) |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 28, 2021 CAD ($) | Jun. 01, 2021 CAD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2021 CAD ($) | Oct. 27, 2021 CAD ($) | Jun. 01, 2021 $ / shares | Mar. 20, 2019 CAD ($) | Mar. 20, 2019 $ / shares
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, gross |  |  | $ 378,737,000 | $ 325,727,000 |  |  |  |
Debt issuance costs |  |  | 4,371,000 | 5,178,000 |  |  |  |
Cash advance |  |  | 83,400,000 | 135,049,000 |  |  |  |
Payments of promissory notes |  |  | 5,400,000 | 4,200,000 |  |  |  |
Convertible debentures |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, gross |  |  | $ 129,750,000 | 129,750,000 |  |  |  |
Redemption price as a percentage of the principal amount |  |  | 101.00% |  |  |  |  |
Convertible debentures | 5.50% convertible debentures |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, gross |  |  | $ 74,750,000 | $ 74,750,000 |  |  |  |
Interest rate |  | 5.50% | 5.50% | 5.50% |  |  | 5.50% |
Conversion price (in CAD per share) | $ / shares |  |  |  |  |  | $ 24.75 |  |
Share equivalence per $1000 debenture |  | $ 40.4040 |  |  |  |  |  |
Debt issuance costs |  | $ 3,531,000 |  |  |  |  |  |
Redemption price as a percentage of the principal amount |  | 125.00% |  |  |  |  |  |
Convertible debentures | 5.00% convertible debentures |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, gross |  |  | $ 55,000,000 | $ 55,000,000 |  |  |  |
Interest rate |  |  | 5.00% |  |  |  | 5.00% |
Conversion price (in CAD per share) | $ / shares |  |  |  |  |  |  |  | $ 26.25
Share equivalence per $1000 debenture |  |  |  |  |  |  | $ 38.0952 |
Debt issuance costs |  |  |  |  |  |  | $ 2,691,000 |
Financing obligations |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, gross |  |  | $ 32,889,000 | $ 47,945,000 |  |  |  |
Interest rate |  |  |  | 2.23% |  |  |  |
Debt instrument related obligations |  |  |  | $ 11,700,000 |  |  |  |
Secured debt | Equipment Promissory Notes |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate |  |  | 5.85% | 4.20% |  |  |  |
Debt instrument, face amount |  |  | $ 3,400,000 | $ 4,300,000 |  |  |  |
Secured debt | Promissory Note | DGI |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate |  |  |  | 2.90% |  |  |  |
Debt instrument, face amount |  |  |  | $ 400,000 |  |  |  |
Mortgage |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, gross |  |  | $ 29,231,000 | $ 30,000,000 |  |  |  |
Mortgage | BDC |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount | $ 30,000,000 |  |  |  | $ 21,100,000 |  |  |
Debt instrument additional loan | 7,000,000 |  |  |  |  |  |  |
Cash advance | $ 1,900,000 |  |  |  |  |  |  |
Debt instrument, interest rate, effective percentage | 3.40% |  |  |  |  |  |  |

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