Financial instruments and risk management - Maximum credit exposure (Details) - CAD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Trade accounts receivable	$ 39,625	$ 51,774
Holdbacks	372	380
Accrued trade receivables	33,207	12,266
Contract receivables, included in accounts receivable	73,204	64,420
Other receivables	10,607	4,367
Total accounts receivable	83,811	68,787
Contract assets	15,802	9,759	$ 7,008
Total	$ 99,613	$ 78,546

Accounts Receivable, Holdbacks, Gross, Current

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- Definition

Contract Receivables Included In Accounts Receivable

+ References

No definition available.

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- Definition

Fair Value, Concentration of Risk, Other Receivables

+ References

No definition available.

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- Definition

Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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- Definition

Amounts due for billed services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the Company and, at a minimum, one other party. An example would be amounts billed to customers under contracts or programs but not paid as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

+ References

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- Definition

This item represents disclosure of all significant concentrations of credit risk or market risk arising from the subject financial instrument (as defined), whether from an individual counterparty or groups of counterparties.

+ References

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

+ References

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