Note 9 - Income Taxes - Cash Paid for Income Taxes (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Federal tax | $ 0 | |
| State | 19,864 | |
| Foreign | 305,772 | |
| Total cash paid for income taxes (net of refunds) | 325,636 | $ 206,121 |
| New Hampshire Tax Authority [Member] | ||
| State | 11,488 | |
| Other State Tax Authorities [Member] | ||
| State | 8,376 | |
| State Administration of Taxation, China [Member] | ||
| Foreign | 237,990 | |
| China withholding tax | $ 67,782 | |
| X | ||||||||||
- Definition Amount, after income tax refund received, of cash paid to foreign tax jurisdiction for tax on income. No definition available.
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| X | ||||||||||
- Definition Amount, after income tax refund received, of cash paid to federal (national) tax jurisdiction for tax on income. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after income tax refund received, of cash paid to foreign tax jurisdiction for tax on income. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after income tax refund received, of cash paid to state and local tax jurisdictions for tax on income. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after refund, of cash paid to foreign, federal, state, and local jurisdictions as income tax. Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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