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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)

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