Annual report pursuant to Section 13 and 15(d)

Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details)

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Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Deferred tax assets      
Reserves and accruals $ 1,056 $ 1,009 $ 169
Net operating loss carryforwards 16,986 10,985 6,802
Research and development credit carryforwards 2,177 1,194 515
Lease Liabilities 1,336    
Gross deferred tax assets 21,555 13,188 7,486
Valuation allowance (20,196) (12,560) (7,434)
Net deferred tax assets 1,359 628 52
Deferred tax liabilities      
Property and equipment (557) $ (628) $ (52)
Right-of-use asset $ (802)