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Commitments and contingencies (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Jan. 01, 2023
Dec. 31, 2021
Commitments and contingencies        
Lease term       5 years
Lease payments $ 0.3 $ 0.2    
Purchase obligation     $ 2.6  
Finance lease, lease term     2 years