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Consolidated Statements of Cash Flows Supplemental Disclosure - reconciliation of liabilities arising from financing activities (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Bonds Payable.      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Opening balance $ 35,227 $ 38,053 $ 35,418
Non-cash changes:      
Accretion 140 145 143
Cumulative translation adjustments 171 (2,971) 2,492
Ending balance 35,538 35,227 38,053
Lease liabilities.      
Disclosure of reconciliation of liabilities arising from financing activities [line items]      
Opening balance 767 1,175 1,196
Cash flows (378) (466) (510)
Non-cash changes:      
Additions 295 84 368
Accretion 28 42 59
COVID-19 related rent concessions     (6)
Cumulative translation adjustments (6) (68) 68
Ending balance $ 706 $ 767 $ 1,175