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Shareholders Equity - Share Purchase Warrants and Deferred share unit plan (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2022
USD ($)
EquityInstruments
Dec. 31, 2021
USD ($)
EquityInstruments
Stock-based payments    
Number of other equity instruments outstanding in share-based payment arrangement at beginning of period 98,894  
Number of other equity instruments outstanding in share-based payment arrangement at end of period 102,104 98,894
DSU plan    
Stock-based payments    
Number of other equity instruments outstanding in share-based payment arrangement at beginning of period 107,635 119,025
Granted 14,703 15,416
Settled (12,210) (26,806)
Number of other equity instruments outstanding in share-based payment arrangement at end of period 110,128 107,635
DSU liability | $ $ 15.0 $ 14.9