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Income Taxes - Deferred tax assets and liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2014
--- | --- | --- | ---
Deferred Tax Assets: |  |  |
Net operating loss carryforwards | $ 72,777 | $ 66,160 |
Section 174 Capitalized R&D | 37,240 | 16,570 |
Research and development credits | 19,058 | 12,844 | $ 200
Equity compensation | 10,533 | 10,021 |
Deferred Zejula royalty revenue | 6,978 | 7,371 |
Lease liability | 3,912 | 4,194 |
Other, net | 7,201 | 3,458 |
Total deferred tax assets | 157,699 | 120,618 |
Deferred Tax Liabilities: |  |  |
ROU asset | (3,552) | (3,859) |
Other, net | (2,658) | 0 |
Fixed assets | (122) | (189) |
Total deferred tax liabilities | (6,332) | (4,048) |
Net deferred tax assets | 151,367 | 116,570 |
Less: valuation allowance | (151,367) | (116,570) |
Deferred tax assets, net of valuation allowance | $ 0 | $ 0 |

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