Annual report pursuant to Section 13 and 15(d)

Income Taxes - Components of Deferred Tax Assets (Detail)

v3.21.1
Income Taxes - Components of Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred tax assets:    
Federal and state net operating loss carryforwards $ 123,144 $ 107,213
State and federal research and development tax credit carryforwards 28,861 25,661
Capitalized research and development 2,363 4,725
Stock based compensation 3,822 3,562
Other 1,256 1,199
Total deferred tax assets 159,446 142,360
Deferred tax liabilities:    
Depreciation and amortization (269) (372)
Other (57) (49)
Total deferred tax liabilities (326) (421)
Valuation allowance (159,120) $ (141,939)
Net deferred tax assets $ 0