Leases - Balance sheet and other information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Leases
Right-of use asset	$ 2,416		$ 2,416		$ 2,726
Lease liability	3,081		3,081
Lease Expense
Operating lease expense	221	$ 221	664	$ 664
Total Lease Expense	221	221	664	664
Other Information - Operating Leases
Operating cash flows paid for amounts included in measurement of lease liabilities	$ 257	$ 252	$ 761	$ 703
Weighted average remaining lease term (in years)	3 years 9 months 18 days		3 years 9 months 18 days
Weighted average discount rate	14.60%		14.60%
Maturity Analysis
2021	$ 257		$ 257
2022	1,039		1,039
2023	1,060		1,060
2024	1,081		1,081
2025	546		546
Total	3,983		3,983
Less: Present value discount	(902)		(902)
Lease Liability	$ 3,081		$ 3,081