Income taxes - Additional information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (18)	$ 37
Effective tax rate	0.10%	1.10%
Valuation allowance	$ 24,479	$ 19,095	$ 16,724