Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating leases
Operating lease cost	$ 457	$ 382	$ 1,309	$ 1,228
Variable lease cost	94	90	286	403
Operating lease expense	551	472	1,595	1,631
Finance leases
Amortization of right-of-use assets	73	0	184	0
Interest on lease obligations	22	0	55	0
Finance lease expense	95	0	239	0
Short-term lease rent expense	4	4	12	12
Total rent expense	650	476	1,846	1,643
Other information
Operating cash flows from operating leases	444	393	1,298	1,248
Operating cash flows from finance leases	22	0	56	0
Financing cash flows from finance leases	59	0	152	0
Right of use assets exchanged for operating lease liabilities	718	0	4,089	0
Right of use assets exchanged for finance lease liabilities	$ 588	$ 0	$ 1,365	$ 0
Weighted-average remaining lease term – operating leases	3 years 8 months 12 days	2 years 3 months 18 days	3 years 8 months 12 days	2 years 3 months 18 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	6.30%	6.80%	6.30%	6.80%
Weighted-average discount rate – finance leases	5.90%	0.00%	5.90%	0.00%