Note 5 - Stockholders' Equity - Schedule Stock Options (Details) - $ / shares |
3 Months Ended | |||
|---|---|---|---|---|
Mar. 31, 2026 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
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| Weighted average exercise price (in dollars per share) | $ 0.65 | $ 0.65 | $ 0.9 | $ 1.1 |
| Options outstanding (in shares) | 450,000 | 450,000 | 450,000 | 250,000 |
| Options exercisable (in shares) | 331,000 | |||
| Options, weighted average remaining term (Year) | 7 years 9 months 14 days | |||
| Options, exercisable, weighted average exercise price (in dollars per share) | $ 0.65 |
| X | ||||||||||
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Weighted-average contractual term remaining for option award outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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