Leases - Maturities of Lease Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Operating Lease Liabilities, Payments Due [Abstract]
2020 (remaining 3 months)	$ 589
Maturing in first year	2,305	$ 1,986
Maturing in second year	2,243	1,957
Maturing in third year	2,300	1,894
Maturing in fourth year	2,311	1,951
Maturing in fifth year		2,010
Thereafter	5,101
Thereafter		5,101
Total lease payments	14,849	14,899
Less imputed interest	(2,535)	(2,825)
Total operating lease liabilities	12,314	12,074
Assets and Liabilities, Lessee [Abstract]
Current portion of operating lease liabilities	1,654	1,322
Operating lease liabilities, net of current portion	10,660	10,752
Total operating lease liabilities	$ 12,314	$ 12,074