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
Finance lease cost:
Amortization of right-of-use asset	$ 45	$ 45	$ 90	$ 90
Interest expense on lease liability	32	33	65	67
Total finance lease cost	77	78	155	157
Operating lease cost	511	505	1,027	1,033
Short-term and equipment lease cost	7	12	17	21
Sublease income	(6)	(4)	(15)	(10)
Total lease costs	$ 589	$ 591	$ 1,184	$ 1,201