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v3.20.4

Income Taxes - Deferred Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 64,147 | $ 150,727
Research credit carryforwards | 19,623 | 14,843
Stock Compensation | 11,994 | 9,544
Other | 13,120 | 10,602
Deferred tax assets | 108,884 | 185,716
Valuation allowance for deferred tax assets | (24,858) | (141,338)
Net deferred tax assets | 84,026 | 44,378
Deferred tax liabilities: |  |
Identified intangibles | (119,381) | (40,768)
Other | (4,923) | (10,939)
Net deferred tax liabilities | (124,304) | (51,707)
Deferred income taxes, net | $ (40,278) | $ (7,329)

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