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Income Taxes- Schedule of Deferred Tax Assets for Federal Income Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Deferred tax assets |  |
Net operating losses | $ 87,742 | $ 72,689
Capitalized research and development costs, net of amortization | 35,608 | 33,778
Research and development credits | 13,269 | 9,746
Start-up costs | 4,051 | 4,407
Deferred revenue | 12,182 | 13,353
Lease liability | 733 | 668
Accrued compensation | 405 | 0
Amortizable assets and other | 27 | 21
Equity compensation | 1,115 | 87
Gross deferred tax assets | 155,132 | 134,749
Valuation allowance | (153,855) | (133,580)
Deferred tax assets, net of valuation allowance | 1,277 | 1,169
Deferred tax liabilities |  |
Right of use asset | (848) | (645)
Depreciation | (429) | (524)
Deferred tax liabilities | (1,277) | (1,169)
Net deferred tax assets and liabilities | $ 0 | $ 0

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