Provision for Income Taxes - Schedule of Components of Deferred Tax Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
Federal and state net operating loss carryforwards	$ 30,049	$ 16,076
Research and development credits carryforwards	8,077	5,087
Depreciation	6,052	3,942
Deferred Revenue	3,277	3,909
Other	2,965	1,724
Total deferred tax assets	50,420	30,738
Less valuation allowance	$ (50,420)	$ (30,738)