Note 5 - Finite-life Intangible Assets (Details Textual) - USD ($) |
12 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Intangible Asset, Finite-Lived, Accumulated Amortization | $ 487,000 | $ 428,000 |
| Impairment of Intangible Assets, Finite-Lived | $ 0 | $ 212,000 |
| Patents [Member] | ||
| Finite-Lived Intangible Asset, Useful Life (Year) | 15 years | |
| Trademarks [Member] | ||
| Finite-Lived Intangible Asset, Useful Life (Year) | 12 years | |
| X | ||||||||||
- Definition Useful life of finite-lived intangible asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of accumulated amortization of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of impairment loss for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|