Net Income (Loss) Per Share - Schedule of Dilutive Shares Excluded from the Diluted Net Income (Loss) Per Share Calculation (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 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)	396,516,024	449,301,741	326,731,882	450,960,463
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)	370,622,512	209,979,779	301,035,432	209,979,779
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)	25,893,512	76,965,892	25,643,692	78,624,614
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)	0	705,349	52,758	705,349
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	126,106,580	0	126,106,580