Lease liabilities - Amounts recognized in profit or loss (Details) - USD ($) |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Jun. 30, 2024 |
|
| Lease liabilities | |||
| Depreciation of right-of-use assets | $ 19,558 | $ 73,024 | $ 73,024 |
| Interest expense on lease liabilities (Note 20) | 2,005 | $ 3,355 | 3,355 |
| Total lease expense | $ 21,563 | $ 76,379 | |