Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2019	Dec. 31, 2020
Leases
Total lease cost	$ 211	$ 241	$ 200
Classification of operating leases
Operating lease right-of-use assets	1,683			$ 1,820
Operating lease liability, current	621			609
Operating lease liability, non-current	$ 1,255			$ 1,400
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other Accrued Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other Liabilities, Noncurrent
Lease cost
Operating lease cost	$ 168	168
Short-term lease cost	43	73
Total lease cost	$ 211	241	$ 200
Lease Term and Discount Rate
Weighted-average remaining lease term	3 years 6 months
Weighted average discount rate	6.20%
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 160	$ 154
Minimum
Leases
Initial lease term	1 year
Maximum
Leases
Initial lease term	7 years