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Share based payments - Warrants issued and outstanding (Details)
 12 Months Ended
Nov. 15, 2022
$ / shares
Dec. 31, 2022
$ / shares
shares
Dec. 31, 2022
$ / shares
shares
Dec. 31, 2021
$ / shares
shares
Dec. 31, 2021
$ / shares
shares
Weighted average exercise price          
Balance at the end (in dollars per share) | $ / shares $ 3.78        
Number of shares issued or issuable on exercise          
Exercised warrants (in shares)   210,545 210,545 1,569,215 1,569,215
Warrant expires (in shares)   83,213 83,213 22,222 22,222
Balance at the end (in shares)   3,464,177 3,464,177    
Canadian denominated warrants          
Weighted average exercise price          
Balance at the beginning (in dollars per share) | $ / shares     $ 7.53   $ 3.96
Balance at the end (in dollars per share) | $ / shares     $ 8.66   $ 7.53
Number of shares issued or issuable on exercise          
Balance at the beginning (in shares)   1,274,785 1,274,785 1,885,195 1,885,195
Balance at the end (in shares)   981,027 981,027 1,274,785 1,274,785
United States Dollar denominated warrants          
Weighted average exercise price          
Balance at the beginning (in dollars per share) | $ / shares   $ 0.00      
Balance at the end (in dollars per share) | $ / shares       $ 0.00  
Number of shares issued or issuable on exercise          
Balance at the beginning (in shares)   1,274,785 1,274,785    
Balance at the end (in shares)   2,483,150 2,483,150 1,274,785 1,274,785
Weighted average exercise price 9.00 | Canadian denominated warrants          
Weighted average exercise price          
Issuance of warrants (in dollars per share) | $ / shares         $ 9.00
Exercised warrants (in dollars per share) | $ / shares     $ 3.78    
Number of shares issued or issuable on exercise          
Issuance of warrants (in shares)       875,917 875,917
Exercised warrants (in shares)   (210,545) (210,545)    
Weighted average exercise price 5.58 | Canadian denominated warrants          
Weighted average exercise price          
Issuance of warrants (in dollars per share) | $ / shares         $ 5.58
Warrant expiries (in dollars per share) | $ / shares     $ 3.78    
Number of shares issued or issuable on exercise          
Issuance of warrants (in shares)       105,110 105,110
Warrant expires (in shares)   (83,213) (83,213)    
Weighted average exercise price 4.86 | Canadian denominated warrants          
Weighted average exercise price          
Exercised warrants (in dollars per share) | $ / shares         $ 4.86
Number of shares issued or issuable on exercise          
Exercised warrants (in shares)       (308,230) (308,230)
Weighted average exercise price 4.86 | United States Dollar denominated warrants          
Weighted average exercise price          
Issuance of warrants (in dollars per share) | $ / shares   $ 3.10      
Number of shares issued or issuable on exercise          
Issuance of warrants (in shares)   2,483,150 2,483,150    
Weighted average exercise price 3.78 | Canadian denominated warrants          
Weighted average exercise price          
Exercised warrants (in dollars per share) | $ / shares         $ 3.78
Number of shares issued or issuable on exercise          
Exercised warrants (in shares)       (818,971) (818,971)
Weighted average exercise prices 3.78 | Canadian denominated warrants          
Weighted average exercise price          
Exercised warrants (in dollars per share) | $ / shares         $ 3.78
Number of shares issued or issuable on exercise          
Exercised warrants (in shares)       (442,014) (442,014)
Weighted average exercise price 1.08 | Canadian denominated warrants          
Weighted average exercise price          
Warrant expiries (in dollars per share) | $ / shares         $ 1.08
Number of shares issued or issuable on exercise          
Warrant expires (in shares)       (11,111) (11,111)
Weighted average exercise price 4.86 | Canadian denominated warrants          
Weighted average exercise price          
Warrant expiries (in dollars per share) | $ / shares         $ 4.86
Number of shares issued or issuable on exercise          
Warrant expires (in shares)       (11,111) (11,111)