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Loss per common share - Schedule of calculation of diluted net loss per share allocable to common stockholders (Details) - shares
shares in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 934 788
Stock options [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 316 475
RSUs [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 339 147
PSUs [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 176 48
Warrant [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 103 118