Commitments and Contingencies - Other Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 11	$ 275
Operating cash flows from finance leases	1	3
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	0	755
Finance leases	$ 0	$ 13
Weighted Average Remaining Lease Term [Abstract]
Operating leases	9 years 2 months 1 day	3 years 2 months 26 days
Finance leases	3 months	1 year 4 months 20 days
Weighted average discount rate:
Operating leases	3.94%	4.56%
Finance leases	4.26%	4.25%