Income Taxes - Effective Tax Rate Reconciliation 2025 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
Federal income tax at the statutory rate	$ 3,985	$ 80,120	$ 32,983
State income taxes, net of federal benefit	(11,735)	1,713	3,730
Excess stock-based compensation benefit		(83,748)	(106,522)
Other		8	1,097
Difference between statutory and foreign tax rates	1,960	801	1,013
Effect of cross-border tax laws	4,180
R&D credits	(49,380)	(36,571)	(26,204)
Valuation allowances	540	(903)	(4,695)
Executive compensation limitation	48,781	51,858	77,350
Other permanent differences	5,711	5,176	1,201
Unrecognized tax benefits	19,556	7,356	4,351
Total tax benefit and effective tax rate	$ (105,682)	$ 4,470	$ (18,722)
Percent
U.S. federal statutory tax rate	21.00%
State and local income taxes, net of federal benefit	(61.80%)
Other foreign jurisdictions	10.30%
Effect of cross-border tax laws	22.00%
R&D credits	(260.20%)
Valuation allowances	2.80%
Executive compensation limitation	257.10%
Other permanent differences	30.10%
Unrecognized tax benefits	103.10%
Total tax benefit and effective tax rate	(557.00%)	1.20%	(11.90%)
United Kingdom
Amount
Excess stock-based compensation benefit	$ (4,282)
Other	$ (626)
Percent
Excess stock-based compensation benefit	(22.60%)
Other adjustments	(3.30%)
United States
Amount
Excess stock-based compensation benefit	$ (124,081)
Other	$ (291)
Percent
Excess stock-based compensation benefit	(653.90%)
Other adjustments	(1.60%)