Leases (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2019 USD ($) ft²
Leases
Lease to eliminate square feet | ft²				16,200
Renewal term (in years)				5 years
Lease, remaining square feet | ft²				33,400
Lease liabilities	$ 3,042
Right-of-use assets	2,970	$ 3,449
Operating lease expense	1,900	2,300	$ 2,500
Variable lease expense	700	1,200	$ 1,500
Operating lease payments	$ 1,800	$ 2,400
Weighted-average remaining lease term	2 years	2 years
Weighted-average discount rate	10.00%	10.40%
Minimum
Leases
Term of lease (in years)	1 year
Maximum
Leases
Term of lease (in years)	4 years
ASC 842
Leases
Term of lease (in years)				3 years
Lease liabilities	$ 1,000	$ 1,900		$ 1,400
Right-of-use assets	$ 1,000	$ 1,900