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Income Taxes - Deferred and Valuation Allowance (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets |  |
Intellectual property | $ 0 | $ 68,567
Research tax credit | 235,532 | 223,366
Capitalized research and development costs | 34,425 | 29,317
Net operating loss carry forwards | 321,004 | 315,444
Share-based compensation | 17,314 | 16,417
Interest carry forward limitation | 17,627 | 12,558
Lease liability | 10,567 | 11,428
Inventory | 1,931 | 10,400
Other | 20,858 | 20,109
Gross deferred tax assets | 659,258 | 707,606
Deferred tax liabilities |  |
Royalty payable | 0 | (68,567)
Other | (10,004) | (11,745)
Total net deferred tax assets | 649,254 | 627,294
Less: valuation allowance | (649,254) | (632,233)
Net deferred tax liability | $ 0 | $ (4,939)

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