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Income Taxes - Benefit (Provision) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income tax benefit (provision): |  |  |
Federal | $ 17,484 | $ 18,513 | $ 16,615
State | 9,606 | 7,082 | 5,802
Expiration of NOLs and R&D credit | (16,862) | (14,210) | (20,294)
Income tax benefit (provision) before valuation allowance | 10,228 | 11,385 | 2,123
Deferred tax valuation allowance | $ (10,228) | (11,158) | (956)
Income tax benefit (provision) |  | $ 227 | $ 1,167

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