Commitments and Contingencies - Schedule of ROU Assets and Related Lease Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Assets And Liabilities Lessee [Abstract]
Cash paid for operating lease liabilities	$ 750	$ 350	$ 1,490	$ 566
Operating lease cost	767	$ 523	1,534	$ 694
Variable lease cost	68		114
Current operating lease liabilities	2,575		2,575		$ 2,483
Non-current operating lease liabilities	$ 10,932		$ 10,932		$ 12,244
Weighted average remaining lease term in years	4 years 7 months 6 days		4 years 7 months 6 days		5 years 1 month 6 days
Weighted average discount rate	3.80%		3.80%		3.80%