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Note 5 - Cash and Cash Equivalents (Tables) | 12 Months Ended
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Jun. 30, 2025
Notes Tables |
Cash, Cash Equivalent, and Investment [Table Text Block] |
|  | As of June 30, |
|  | 2024 |  |  | 2025 |
|  | US$ |  |  | US$ |
Cash and cash equivalents |  |  | 13,311 |  |  |  | 950 |

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