v3.26.3
Stockholders' equity (Details) - USD ($)
$ / shares in Units, $ in Billions
3 Months Ended 7 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Jun. 30, 2026
Mar. 04, 2026
Subsidiary, Sale of Stock [Line Items]          
Dividends declared (in USD per share) $ 0 $ 0      
Ordinary shares          
Subsidiary, Sale of Stock [Line Items]          
Common stock, shares outstanding (in shares) 406,929,463   406,929,463 380,710,559  
Management and PodTech Innovation Inc          
Subsidiary, Sale of Stock [Line Items]          
Issuance of ordinary shares (in shares) 63,520     516,951  
At the market facility          
Subsidiary, Sale of Stock [Line Items]          
Maximum value of shares to be issued under share sale option agreement         $ 6.0
Shares issued under facility (in shares) 59,431,312   59,431,312    
Proceeds from issuance of common stock under facility     $ 3.0