Net Income (Loss) Per Share Attributable to Shareholders - Potentially Dilutive Securities Excluded From Computation (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Redeemable convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded (in shares)	29,084,235	29,084,235	29,084,235	29,084,235
Outstanding stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded (in shares)	0	6,565,802	0	6,565,802
Restricted stock awards in exchange for non-recourse note
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded (in shares)	0	700,000	0	700,000
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded (in shares)	0	121,566	0	121,566
Warrants to purchase redeemable convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded (in shares)	0	9,660	0	9,660
Unvested early-exercised options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potentially dilutive securities excluded (in shares)	0	500	0	500