Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Total lease right-of-use assets	$ 2,569	$ 3,017
Lease liabilities – current portion	1,200	2,060
Lease liabilities – net of current portion	1,462	1,021
Total lease liabilities	$ 2,662	$ 3,081
Weighted-average remaining lease term
Operating leases	2 years 7 months 6 days	3 years 3 months 18 days
Weighted-average discount rate
Operating leases	4.00%	4.00%