Leases - Components of Lease Expense and Supplementary Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease expense	$ 1,370	$ 2,609
Amortization of right-of-use assets	17	1,237
Interest on lease liabilities	18	10
Total finance lease expense	35	1,247
Short-term lease expense	202	123
Total lease expense	1,607	3,979
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	2,884	2,336
Operating cash flows from finance leases	18	10
Financing cash flows from finance leases	$ 70	$ 51