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Stockholders' equity (deficit) - Share-based Payment Award Plans - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Class Of Stock [Line Items]      
Share-based payment arrangement, expense $ 0.5 $ 2.1  
Total unrecognized share based compensation 0.8    
Compensation cost expected to be recognized $ 0.8    
Share-based compensation over a weighted average period 1 year 1 month 6 days    
Performance Shares Units [Member]      
Class Of Stock [Line Items]      
Maximum number shares to be issued upon performance goals are achieved 591,661    
Number of shares outstanding 559,661    
Share-based compensation arrangement by share-based payment award, vesting percentage     100.00%
2019 Stock Incentive Plan [Member]      
Class Of Stock [Line Items]      
Remaining shares of common stock available for future issuance 300,232