Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating leases
Operating lease cost	$ 432	$ 403	$ 851	$ 846
Variable lease cost	90	123	192	312
Operating lease expense	522	526	1,043	1,158
Finance leases
Amortization of right-of-use assets	67	0	112	0
Interest on lease obligations	20	0	33	0
Finance lease expense	87	0	145	0
Short-term lease rent expense	4	4	8	8
Total rent expense	613	530	1,196	1,166
Other information
Operating cash flows from operating leases	428	410	853	855
Operating cash flows from finance leases	21	0	34	0
Financing cash flows from finance leases	56	0	93	0
Right of use assets exchanged for operating lease liabilities	1,476	0	3,371	0
Right of use assets exchanged for finance lease liabilities	$ 316	$ 0	$ 777	$ 0
Weighted-average remaining lease term – operating leases	3 years 6 months	2 years 4 months 24 days	3 years 6 months	2 years 4 months 24 days
Weighted-average remaining lease term – finance leases	5 years 6 months	0 years	5 years 6 months	0 years
Weighted-average discount rate – operating leases	6.20%	6.80%	6.20%	6.80%
Weighted-average discount rate – finance leases	5.50%	0.00%	5.50%	0.00%