Net Loss Per Share Attributable to Common Stockholders - Schedule of Calculation for Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator:
Net loss	$ (42,843)	$ (552,212)	$ (110,880)	$ (616,955)
Dividends on Series A, B, B-1, B-2, C, D, E, F, G, G-3, and G-4 preferred shares	0	(11,540)	0	(39,347)
Cumulative undeclared dividends on Series C preferred shares	0	(668)	0	(1,174)
Net loss attributable to common stockholders, Basic	(42,843)	(564,420)	(110,880)	(657,476)
Net loss attributable to common stockholders, Diluted	$ (42,843)	$ (564,420)	$ (110,880)	$ (657,476)
Denominator:
Weighted-average common shares outstanding, basic	173,381	82,325	171,960	72,930
Weighted-average common shares outstanding, diluted	173,381	82,325	171,960	72,930
Net loss per share attributable to common stockholders, basic	$ (0.25)	$ (6.86)	$ (0.64)	$ (9.02)
Net loss per share attributable to common stockholders, diluted	$ (0.25)	$ (6.86)	$ (0.64)	$ (9.02)