Leases - Summary of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Finance lease cost:
Amortization of right-of-use asset	$ 45	$ 45	$ 90	$ 60
Interest expense on lease liability	33	35	67	46
Total finance lease cost	78	80	157	106
Operating lease cost	505	515	1,033	1,030
Short-term and equipment lease cost	12	3	21	31
Sublease income	(4)	(7)	(10)	(12)
Total lease costs	$ 591	$ 591	$ 1,201	$ 1,155