v3.26.3
Stockholders' equity - Schedule of equity awards (Detail) - Employee stock option [Member] - USD ($)
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Options,Outstanding, beginning of period 4,902,140 1,182,140  
Stock Options, Granted 2,142,572 3,720,000  
Stock Options, Forfeited (9,215)    
Stock Options, Outstanding, end of period 7,035,497 4,902,140 1,182,140
Stock Options, Exercisable, end of period 2,556,260    
Weighted-average Exercise price, beginning of period $ 10.81 $ 6.58  
Weighted-average Exercise Price, Granted 14.1 12.16  
Weighted-average Exercise Price, Forfeited 15.9    
Weighted-average Exercise Price, Exercise price, end of period 11.8 $ 10.81 $ 6.58
Weighted-average Exercise Price, Exercisable, end of period $ 10.83    
Weighted-average Remaining Contractual Term, Outstanding 8 years 7 months 2 days 9 years 2 months 26 days 9 years 6 months 3 days
Weighted-average Remaining Contractual Term, Granted 9 years 4 months 28 days 9 years 5 months 19 days  
Weighted-average Remaining Contractual Term, Exercisable 8 years 2 months 23 days    
Aggregate Intrinsic Value, Outstanding $ 7,728,384 $ 2,342,847  
Aggregate Intrinsic Value, Outstanding 14,513,940 $ 7,728,384 $ 2,342,847
Aggregate Intrinsic Value,Exercisable $ 8,444,710