Income or loss per share - Schedule of Antidilutive Securities (Details) - shares	7 Months Ended	12 Months Ended
	Dec. 31, 2025	May 25, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Amount of securities excluded from computation of earnings per share (in shares)	12,502,155	12,325,212
Redeemable Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Amount of securities excluded from computation of earnings per share (in shares)	7,401,682	7,000,626
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Amount of securities excluded from computation of earnings per share (in shares)	1,377,054	1,260,299
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Amount of securities excluded from computation of earnings per share (in shares)	1,440,419	1,519,287
PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Amount of securities excluded from computation of earnings per share (in shares)	2,283,000	2,545,000