Other payables and accrued liabilities - Summary of Other Payables and Accrued Liabilities (Parenthetical) (Details) - USD ($) |
3 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2022 |
Jun. 30, 2022 |
|
| Accounts Payable And Accrued Liabilities Disclosure [Line Items] | ||
| Exercise price of warrants | $ 4 | |
| Consulting fee | $ 856,170 | |
| Consultant [Member] | ||
| Accounts Payable And Accrued Liabilities Disclosure [Line Items] | ||
| Class of warrant or right, issuable | 300,000 | |
| Warrants exercisable term | 5 years | |
| Exercise price of warrants | $ 4 |