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Right of use of assets - Summary of costs included in operating expenses related to right of use assets (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Lease cost    
Operating lease cost $ 573 $ 560
Short-term lease cost 87 86
Total lease cost 660 646
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows used in operating leases 562 578
Right of use assets obtained in exchange for new operating lease liabilities $ 102 $ 0
Weighted average remaining lease term (in years) 1 year 7 months 6 days 10 months 24 days
Weighted average discount rate (in percent) 6.01% 4.67%