Net Income (Loss) Per Share - Schedule of Dilutive Shares Excluded from the Diluted Net Income (Loss) Per Share Calculation (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from diluted net income (loss) per common share computation (in shares)	342,796,526	452,060,368	290,295,135	451,428,385
Convertible preferred stock issued and outstanding, excluding shares held by consolidated VIE
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from diluted net income (loss) per common share computation (in shares)	315,222,140	158,365,655	265,665,203	158,365,655
Stock options issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from diluted net income (loss) per common share computation (in shares)	27,484,623	80,099,705	24,462,457	79,467,722
Common stock warrants issued and outstanding
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from diluted net income (loss) per common share computation (in shares)	89,763	330,163	167,475	330,163
Series E-1 convertible preferred stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from diluted net income (loss) per common share computation (in shares)	0	35,544,141	0	35,544,141
Series F convertible preferred stock warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total common stock equivalents excluded from diluted net income (loss) per common share computation (in shares)	0	177,720,704	0	177,720,704