Leases - Supplemental Lease Information and Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in lease liabilities
Operating cash flows from operating leases	$ 195	$ 185	$ 502	$ 556
ROU assets obtained in exchange for lease obligations
Operating leases	0	0	0	17
Lease Cost
Operating leases	257	277	816	790
Short-term leases	$ 40	$ 17	$ 99	$ 45
Weighted average remaining lease term (years)	3 years 9 months 18 days		3 years 9 months 18 days
Weighted average discount rate (%)	7.10%		7.10%