Income taxes - Schedule of components of income before income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Loss before income taxes	$ (50,628)	$ (99,178)	$ (106,420)
United States loss [Member]
Income Tax Contingency [Line Items]
Loss before income taxes	(48,530)	(98,462)	(106,467)
Foreign income (loss) [Member]
Income Tax Contingency [Line Items]
Loss before income taxes	$ (2,098)	$ (716)	$ 47