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Deferred Income Tax Assets and Liabilities - accumulated non-capital losses (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
CAD ($)
Canada  
Deferred Income Tax Assets and Liabilities  
Gross amount $ 5,267
Canada | Bottom of range  
Deferred Income Tax Assets and Liabilities  
Expiration period for estimated accumulated non capital losses 2037
Canada | Top of range  
Deferred Income Tax Assets and Liabilities  
Expiration period for estimated accumulated non capital losses 2042
Germany  
Deferred Income Tax Assets and Liabilities  
Gross amount $ 136
Expiration dates for estimated accumulated non capital losses Indefinite
Malta  
Deferred Income Tax Assets and Liabilities  
Gross amount $ 88,082
Amount for which no deferred income tax asset is recognized $ 26,843
Expiration dates for estimated accumulated non capital losses Indefinite
Africa.  
Deferred Income Tax Assets and Liabilities  
Gross amount $ 24,982
Expiration dates for estimated accumulated non capital losses Indefinite