Lease obligation (Details) $ in Thousands		3 Months Ended	12 Months Ended
	Jun. 22, 2022 USD ($)	Jun. 30, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Feb. 01, 2024 USD ($)	Aug. 11, 2023 ft²	Sep. 30, 2021
Change in operating lease, right-of-use assets			$ (1,975)	$ (3,462)	$ (2,606)
Change in operating lease liabilities			(2,833)	(3,922)	(3,428)
Gain on lease termination				2,468
Restricted cash included in deposits and other noncurrent assets			1,593	1,515	1,779
Lease expense			$ 3,600	$ 4,600	$ 6,800
Weighted average remaining lease term			5 years
Weighted average incremental borrowing rate			7.40%
Total minimum lease payments
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]			Other Liabilities, Current	Other Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]			Other Liabilities, Noncurrent	Other Liabilities, Noncurrent
75 Sidney Street
Sublease term								3 years 3 months 18 days
Change in operating lease, right-of-use assets	$ (14,500)
Change in operating lease liabilities		$ (17,000)
Gain on lease termination		$ 2,500
Restricted cash included in deposits and other noncurrent assets			$ 1,500
75 Hayden Avenue
Lease term						7 years
Expected contractual obligation for lease not yet commenced						$ 37,800
Area of additional facility leased | ft²							61,307