Lease obligation (Details) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Aug. 11, 2023 ft²	Dec. 31, 2022 USD ($)	Sep. 30, 2021
Change in operating lease, right-of-use assets				$ (1,459)	$ (3,005)
Change in operating lease liabilities				(2,102)	(3,280)
Restricted cash included in deposits and other noncurrent assets	$ 1,593			1,593			$ 1,515
Lease expense	$ 900	$ 1,000		$ 2,700	$ 3,800
Weighted average remaining lease term	5 years 3 months 18 days			5 years 3 months 18 days
Weighted average incremental borrowing rate	7.40%			7.40%
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 termination of lease			$ 2,500
Restricted cash included in deposits and other noncurrent assets	$ 1,500			$ 1,500
75 Hayden Avenue
Area of additional facility leased | ft²						61,307