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Financial instruments and risk management - Trade receivables (Details) - CAD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Not past due | $ 31,923,000 | $ 31,531,000
Past due 1-30 days | 6,190,000 | 19,209,000
Past due 31-60 days | 1,174,000 | 1,250,000
More than 61 days | 710,000 | 164,000
Total | 39,997,000 | 52,154,000
Allowance for doubtful accounts | $ 0 | $ 0
Minimum |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment terms | 15 days |
Maximum |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Payment terms | 60 days |

X
- Definition Accounts Receivable, 1 to 30 Days Past Due + References No definition available. + Details
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X
- Definition Accounts Receivable, 31 to 60 Days Past Due + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition Amount, after 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 -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=124259787&loc=d3e4531-111522 + Details
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