Income taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Contingency [Line Items]
Valuation Allowance, Deferred Tax Asset, Increase	$ 10,200	$ 24,900
Net change in total valuation allowance	10,200	24,900
Pre-tax income (loss) from company's operations	(50,628)	(99,178)	$ (106,420)
Income tax expense (benefit)	(338)	435	169
Unrecognized tax benefits	1,039	1,421	$ 717
Unrecognized Tax Benefits, Period Increase (Decrease)	0	0
Income Tax Interest and Penalties Accrued	0	$ 0
R&D [Member]
Income Tax Contingency [Line Items]
Tax Credit Carryforward, Amount	$ 2,400
Tax Credit Carryforward, Expiration Date	Jan. 01, 2038
State [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	$ 95,000
Operating Loss Carryforwards, Expiration Date	Jan. 01, 2034
NOL carryback refund	$ 95,000
Federal [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards	282,100
NOL carryback refund	$ 282,100