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Financial instruments and risk management - Contingent consideration, risk management, liquidity risk, market risk and credit risk (Details) |  | 12 Months Ended |
--- | --- | --- | ---
Oct. 05, 2022 $ / shares shares | Dec. 31, 2023 CAD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2023 $ / shares
Minimum | MacKellar [Member] |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Increase (decrease) in forecasted net income at fair value of earn out liability |  | $ (7,970,000) |  |
Maximum | MacKellar [Member] |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Increase (decrease) in forecasted net income at fair value of earn out liability |  | $ 7,970,000 |  |
Customer A | Revenues | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 27.00% | 21.00% |
Customer B | Revenues | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 23.00% | 31.00% |
Customer C | Revenues | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 20.00% | 24.00% |
Customer D | Revenues | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 9.00% | 14.00% |
Customer 1 | Accounts receivable and contract assets | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 22.00% | 0.00% |
Customer 2 | Accounts receivable and contract assets | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 16.00% | 32.00% |
Customer 3 | Accounts receivable and contract assets | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 13.00% | 16.00% |
Customer 4 | Accounts receivable and contract assets | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 9.00% | 15.00% |
Customer 5 | Accounts receivable and contract assets | Major customers |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Concentration risk, percentage |  | 2.00% | 11.00% |
Credit Facility |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Outstanding balance, long-term debt |  | $ 317,500,000 | $ 180,000,000 |
Basis on variable rate, adjustment |  | 1.00% |  |
Corresponding change in annual interest expense |  | $ 3,200,000 |  |
Credit Facility | Credit facility | Revolver |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Unused borrowing availability under the revolving facility |  | 129,300,000 | 88,000,000 |
Unused borrowing availability under finance lease obligations |  | 60,100,000 | 46,600,000 |
Interest Rate Swap |  |  |  |
Concentration Risk [Line Items] |  |  |  |
Realized gain |  | 6,612,000 | 0 |
Unrealized gain |  | $ 229,000 | $ 778,000 |
Conversion of stock, shares issued (in shares) | shares | 200,678 |  |  |
Common stock par value (in usd per share) | $ / shares | $ 14.38 |  |  |
Conversion of stock, additional shares issued (in shares) | shares | 458,400 |  |  |
Common stock, par value of additional shares (in usd per share) | $ / shares | $ 18.94 |  |  |
Common stock, fair value per share (in usd per share) | $ / shares |  |  |  | $ 27.65

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