v3.25.4
Share-based compensation - Measurement of the fair values at grant date of the equity-settled share-based payment plans (Details) - Long-Term Incentive Plan
Oct. 01, 2025
USD ($)
Y
$ / shares
Jul. 01, 2025
USD ($)
Y
$ / shares
Jul. 01, 2024
USD ($)
Y
$ / shares
Share-based compensation      
Weighted average fair value | $ $ 2.84 $ 2.82 $ 1.82
Exercise price $ 7.97 $ 7.89 $ 5.07
Weighted average share price $ 7.97 $ 7.89 $ 5.07
Expected volatility 64.69% 65.43% 64.47%
Expected life | Y 1.97 1.97 1.97
Risk free rate 1.97% 1.82% 2.88%