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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets: |  |
Net operating loss | $ 12,448 | $ 20,963
Accrued bonus | 931 | 806
Tax credits | 26,682 | 26,319
Stock-based compensation | 15,311 | 13,351
Deferred revenue | 63,004 | 67,673
Lease liability | 9,030 | 10,055
Section 174 R&D capitalization | 62,305 | 35,150
Refund liability | 24,707 | 0
Other | 521 | 1,608
Gross deferred tax assets | 214,939 | 175,925
Less valuation allowance | (204,550) | (164,316)
Total deferred tax assets | 10,389 | 11,609
Deferred tax liabilities: |  |
Depreciation and amortization | (4,544) | (5,155)
Right-of-use assets | (5,845) | (6,454)
Gross deferred tax liabilities | (10,389) | (11,609)
Deferred tax assets, net | $ 0 | $ 0

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