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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets: |  |
Net operating losses | $ 103,299 | $ 85,442
Tax credits | 29,582 | 21,215
Deferred revenue | 861 | 416
Equity compensation | 4,879 | 5,314
Lease liabilities | 18,822 | 17,732
Accrued compensation | 3,323 | 4,510
Bad debt | 447 | 656
Other accrued expense | 218 | 16
Capitalized research and development costs | 35,047 | 29,991
Other | 1,369 | 431
Gross deferred tax assets | 197,847 | 165,723
Less: Valuation allowance | (161,966) | (132,581)
Total deferred tax assets | 35,881 | 33,142
Deferred tax liabilities: |  |
Prepaid expenses | (16,505) | (15,309)
Right-of-use assets | (10,626) | (10,056)
Depreciation | (3,779) | (4,275)
Intangible assets | (1,179) | (1,540)
Other | (341) | (123)
Total deferred tax liabilities | (32,430) | (31,303)
Net deferred tax assets | $ 3,451 | $ 1,839

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