Note 4 - Fair Value Measurements - Reconciliation of Equity Securities (Details) - USD ($) |
3 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| ONCO Series D Preferred Stock [Member] | ||
| Balance | $ 1,764,318 | $ 0 |
| Additions | 0 | 0 |
| Change in fair value of equity securities | 205,097 | 0 |
| Balance | 1,969,415 | 0 |
| ONCO Warrant [Member] | ||
| Balance | 760,987 | 0 |
| Additions | 0 | 0 |
| Change in fair value of equity securities | (325,175) | 0 |
| Balance | $ 435,812 | $ 0 |
| X | ||||||||||
- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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