Right of use of assets - Summary of costs included in operating expenses related to right of use assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Lease cost
Operating lease cost	$ 1,136	$ 1,151
Short-term lease cost	163	86
Total lease cost	1,299	1,237
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows used in operating leases	1,123	1,122
Right of use assets obtained in exchange for new operating lease liabilities	$ 3,645	$ 822
Weighted average remaining lease term (in years)	2 years 4 months 24 days	1 year 9 months 18 days
Weighted average discount rate (in percent)	8.49%	5.52%