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Share capital - Schedule of changes in number of warrants outstanding (Details) - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of Share based compensation and warrant reserve [Abstract]      
Warrants outstanding, Opening balance 6,956,795 6,749,109 467,451
Warrants, Issued   212,162 6,335,758
Warrants, Expired (474,702) (4,476) (54,100)
Warrants outstanding, Closing Balance 6,482,093 6,956,795 6,749,109
Weighted average exercise price, Warrants outstanding opening balance $ 5.5 $ 5.62 $ 10.2
Weighted average exercise price warrants issued   1.93 5.27
Weighted average exercise price warrants expired 8.54 5.43 4.97
Weighted average exercise price, Warrants outstanding closing balance $ 5.48 $ 5.5 $ 5.62