Income Taxes - Effective Tax Rates (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Effective tax rates differing from U.S. federal statutory rate
U.S. Federal taxes (benefit) at statutory rate	$ (39,844)	$ (91,251)	$ (114,832)
State tax expense	(21,613)	(13,492)	(21,676)
Research and development credits	(17,621)	(10,837)	(7,024)
Stock-based compensation	(62,969)	(6,422)	3,949
Foreign tax	(25)	(106)	332
Nondeductible officers' compensation	31,718	8,651	4,883
Acquisition costs		563	3,226
Nondeductible meals and other	2,870	(3,397)	1,964
Change in valuation allowance	108,179	116,562	130,156
Provision for income taxes	$ 695	$ 271	$ 978
U.S. Federal taxes (benefit) at statutory rate (as a percent)	21.00%	21.00%	21.00%
State tax expense (as a percent)	11.39%	3.10%	3.96%
Research and development credits (as a percent)	9.29%	2.49%	1.28%
Stock-based compensation (as a percent)	33.19%	1.48%	(0.72%)
Foreign tax differential (as a percent)	0.01%	0.02%	(0.06%)
Nondeductible officers' compensation (as a percent)	(16.72%)	(1.99%)	(0.89%)
Acquisition costs (as a percent)	0.00%	(0.13%)	(0.59%)
Other (as a percent)	(1.51%)	0.79%	(0.36%)
Change in valuation allowance (as a percent)	(57.02%)	(26.82%)	(23.80%)
Provision for income taxes (as a percent)	(0.37%)	(0.06%)	(0.18%)
Income tax expense	$ 695	$ 271	$ 978