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Income Taxes - Schedule of Significant Components Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Net operating loss carryforwards $ 5,151 $ 9,947
Research and development tax credits 705 506
Accruals and reserves 14 43
Stock compensation 802 391
Depreciation and amortization 1,905 116
Lease liability 30 68
Total deferred tax assets 8,607 11,071
Right-of-use asset (29) (66)
Acquired IPR&D (6,801)  
Total deferred tax liabilities (6,830) (66)
Less: valuation allowance (5,883) $ (11,005)
Net deferred tax liabilities $ (4,106)