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Line of Credit Facility, Finance Lease, Remaining Borrowing Capacity

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Face amount or stated value per share of common stock.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of increase in the fair value of derivatives recognized in the income statement.

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time.

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Number of new stock issued during the period.

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Financial instruments and risk management - Risk Management and Market risk and credit risk (Details) $ in Thousands		12 Months Ended
	Oct. 05, 2022 $ / shares shares	Dec. 31, 2022 CAD ($)	Dec. 31, 2021 CAD ($) shares	Dec. 31, 2020 CAD ($)	Dec. 31, 2022 $ / shares	Jun. 01, 2021	Mar. 20, 2019
Concentration Risk [Line Items]
Net realized gain (loss)		$ 778	$ 2,737
Customer A \| Revenues \| Major customers
Concentration Risk [Line Items]
Concentration risk, percentage		31.00%	38.00%
Customer B \| Revenues \| Major customers
Concentration Risk [Line Items]
Concentration risk, percentage		24.00%	27.00%
Customer C \| Revenues \| Major customers
Concentration Risk [Line Items]
Concentration risk, percentage		21.00%	10.00%
Customer D \| Revenues \| Major customers
Concentration Risk [Line Items]
Concentration risk, percentage		14.00%	17.00%
Customer 1 \| Accounts receivable and contract assets \| Major customers
Concentration Risk [Line Items]
Concentration risk, percentage		32.00%	45.00%
Customer 2 \| Accounts receivable and contract assets \| Major customers
Concentration Risk [Line Items]
Concentration risk, percentage		16.00%	6.00%
Customer 3 \| Accounts receivable and contract assets \| Major customers
Concentration Risk [Line Items]
Concentration risk, percentage		15.00%	15.00%
Customer 4 \| Accounts receivable and contract assets \| Major customers
Concentration Risk [Line Items]
Concentration risk, percentage		11.00%	15.00%
Convertible Subordinated Debt \| 5.50% convertible debentures
Concentration Risk [Line Items]
Interest rate		5.50%	5.50%			5.50%	5.50%
Issuance of common shares \| shares			4,583,655
Credit Facility
Concentration Risk [Line Items]
Outstanding balance, long-term debt		$ 180,000	$ 110,000
Basis on variable rate, adjustment		1.00%
Corresponding change in annual interest expense		$ 1,800
Credit Facility \| Credit facility \| Revolver
Concentration Risk [Line Items]
Unused borrowing availability under the revolving facility		88,000	181,100
Unused borrowing availability under finance lease obligations		46,600	28,600
Interest Rate Swap
Concentration Risk [Line Items]
Unrealized gain		$ 778		$ 4,334
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	152,100
Common stock, par value of additional shares (in usd per share) \| $ / shares					$ 17.84
Common stock, fair value per share (in usd per share) \| $ / shares					$ 18.08
Net realized gain (loss)			2,737
Derivative, Gain on Derivative			$ 7,071