Leases - Components 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
Leases [Abstract]
Operating lease costs	$ 524	$ 673	$ 1,047	$ 1,562
Amortization expense related to right-of-use assets	193	195	371	356
Interest expense for finance lease liabilities	21	31	37	65
Variable lease costs	153	94	385	201
Total lease costs	$ 891	$ 993	$ 1,840	$ 2,184