v3.23.1
Shareholders' equity - Additional Information (Detail)
9 Months Ended
Feb. 09, 2023
USD ($)
Mar. 31, 2023
USD ($)
Mar. 31, 2023
£ / shares
shares
Feb. 09, 2023
£ / shares
shares
Feb. 09, 2023
$ / shares
shares
Jun. 30, 2022
£ / shares
shares
Class of Stock [Line Items]            
Common stock shares authorized     98,998,131     98,998,131
Cash dividends | $   $ 0        
Common stock shares issued     93,781,478 3,699,910 3,699,910 74,760,432
Common stock par or stated value per share | £ / shares     £ 0.0025 £ 0.90   £ 0.0025
Gross Cash Proceeds | $ $ 20,300,000          
American Depository Shares            
Class of Stock [Line Items]            
Common stock shares issued       7,511,525 7,511,525  
Common stock par or stated value per share | $ / shares         $ 2.17