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Financial instruments and risk management - Financial instruments (Details) - CAD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Level 1 | Carrying Amount | Convertible debentures
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	$ 129,106	$ 129,750
Level 1 | Fair Value | Convertible debentures
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	168,949	160,072
Level 2 | Carrying Amount | Financing obligations
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	197,018	162,266
Level 2 | Carrying Amount | Mortgage
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	27,600	28,429
Level 2 | Fair Value | Financing obligations
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	196,240	159,900
Level 2 | Fair Value | Mortgage
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	$ 23,993	$ 22,780

X

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
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Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org/1943274/2147482907/825-10-50-10

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- References

No definition available.

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