Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Leases
Total lease cost	$ 303	$ 164	$ 515	$ 405
Classification of operating leases
Operating lease right-of-use assets	1,544		1,544		$ 1,820
Operating lease liability, current	678		678		609
Operating lease liability, non-current	$ 1,079		$ 1,079		$ 1,400
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Accrued Liabilities, Current		Other Accrued Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent		Other Liabilities, Noncurrent
Lease cost
Operating lease cost	$ 168	152	$ 337	320
Short-term lease cost	135	12	178	85
Total lease cost	$ 303	$ 164	$ 515	405
Lease Term and Discount Rate
Weighted-average remaining lease term	3 years 3 months 18 days		3 years 3 months 18 days
Weighted average discount rate	6.20%		6.20%
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases			$ 304	$ 288
Minimum
Leases
Initial lease term	1 year		1 year
Maximum
Leases
Initial lease term	7 years		7 years