Net Loss and Net Loss Per Share - Schedule of Calculation of Basic and Diluted Net Loss (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Numerator:
Net loss	$ (512,540)	$ (422,773)	$ (145,224)
Denominator:
Common stock shares outstanding (in shares)	146,471,525	142,626,390	137,370,897
Pre-funded warrants (in shares)	26,177,572	21,847,382	0
Weighted average number of shares outstanding, basic (in shares)	172,649,097	164,473,772	137,370,897
Weighted average number of shares outstanding, diluted (in shares)	172,649,097	164,473,772	137,370,897
Net loss per share, basic (usd per share)	$ (2.97)	$ (2.57)	$ (1.06)
Net loss per share, diluted (usd per share)	$ (2.97)	$ (2.57)	$ (1.06)