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Financial instruments and risk management - Financial instruments (Details) - CAD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Level 1 | Carrying Amount | Convertible debentures
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	$ 129,750	$ 129,750
Level 1 | Fair Value | Convertible debentures
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	160,072	131,795
Level 2 | Carrying Amount | Financing obligations
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	162,266	32,889
Level 2 | Carrying Amount | Mortgage
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	28,429	29,231
Level 2 | Fair Value | Financing obligations
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	159,900	30,783
Level 2 | Fair Value | Mortgage
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]
Long-term debt	$ 22,780	$ 24,329

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/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69B

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 69C
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481568/470-20-55-69C

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1D
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1D

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-10

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- References

No definition available.

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