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Income Taxes - Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation between the amount of reported income tax and the amount computed using U.S. Statutory rate
Pre-tax loss	$ (141,429)	$ (112,325)	$ (70,738)
Loss at statutory rates	(29,700)	(23,588)	(14,855)
Research and development credits	(5,237)	(3,876)	(2,422)
State taxes	(13,691)	(9,606)	(7,082)
Other	(1,130)	11,421	(941)
Change in fair value remeasurement of contingent consideration		(1,441)	(295)
Expiration of NOLs and R&D credit	15,141	16,862	14,210
Change in valuation allowance	$ 34,617	$ 10,228	11,158
Income tax (benefit) provision			$ (227)

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to expiration of net operating losses and research and development tax credits under enacted tax laws during the period.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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