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Note 15 - Foreign Operations (Tables) | 9 Months Ended
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Mar. 31, 2026
Notes Tables |
Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] |
|  | Three Months Ended |  |  | Nine Months Ended |
|  | March 31, |  |  | March 31, |
|  | 2026 |  |  | 2025 |  |  | 2026 |  |  | 2025 |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
United States |  | $ | 10,121,552 |  |  | $ | 5,745,895 |  |  | $ | 24,403,590 |  |  | $ | 16,374,544 |
Europe |  |  | 6,978,833 |  |  |  | 2,267,780 |  |  |  | 20,775,704 |  |  |  | 4,857,768 |
China |  |  | 1,036,800 |  |  |  | 711,823 |  |  |  | 3,210,798 |  |  |  | 2,036,124 |
Other Asian countries |  |  | 791,485 |  |  |  | 260,432 |  |  |  | 1,478,072 |  |  |  | 742,950 |
Rest of world |  |  | 221,144 |  |  |  | 181,697 |  |  |  | 691,583 |  |  |  | 981,451 |
|  | $ | 19,149,814 |  |  | $ | 9,167,627 |  |  | $ | 50,559,747 |  |  | $ | 24,992,837 |
Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] |
|  | March 31, |  |  | June 30, |
|  | 2026 |  |  | 2025 |
Long-lived assets: |  |  |  |  |  |  |  |
United States |  | $ | 54,256,805 |  |  | $ | 45,982,722 |
Latvia |  |  | 4,891,752 |  |  |  | 4,848,441 |
China |  |  | 2,112,990 |  |  |  | 2,300,608 |
|  | $ | 61,261,547 |  |  | $ | 53,131,771 |

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