Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue
Total revenue	$ 19,223	$ 14,417	$ 33,968	$ 28,211
Operating costs and expenses
Cost of revenue	20,161	9,199	41,990	20,365
Research and development	128,636	73,928	258,269	141,488
General and administrative	46,653	31,833	101,304	63,241
Total operating costs and expenses	195,450	114,960	401,563	225,094
Loss from operations	(176,227)	(100,543)	(367,595)	(196,883)
Other income (loss), net	4,330	2,480	(6,947)	6,668
Loss before income tax benefit	(171,897)	(98,063)	(374,542)	(190,215)
Income tax benefit	0	523	158	1,302
Net loss	$ (171,897)	$ (97,540)	$ (374,384)	$ (188,913)
Per share data
Net loss per share of class A, B and Exchangeable common stock, basic (in dollars per share)	$ (0.41)	$ (0.40)	$ (0.91)	$ (0.79)
Net loss per share of class A, B and Exchangeable common stock, diluted (in dollars per share)	$ (0.41)	$ (0.40)	$ (0.91)	$ (0.79)
Weighted-average shares (Class A, B and Exchangeable) outstanding, basic (in shares)	417,361,147	242,196,409	410,268,199	239,107,879
Weighted-average shares (Class A, B and Exchangeable) outstanding, diluted (in shares)	417,361,147	242,196,409	410,268,199	239,107,879
Operating revenue
Revenue
Total revenue	$ 19,103	$ 14,404	$ 33,921	$ 27,895
Grant revenue
Revenue
Total revenue	$ 120	$ 13	$ 47	$ 316