Note 1 - Business Activity and Summary of Significant Accounting Policies - Schedule of Inventory (Details) - USD ($) |
Jun. 30, 2026 |
Jun. 30, 2025 |
|---|---|---|
| Components and raw materials | $ 367,000 | $ 379,000 |
| Work in progress | 63,000 | 116,000 |
| Finished goods | 4,298,000 | 2,984,000 |
| Less: Inventory reserve | (2,317,000) | (1,413,000) |
| Inventory, net | $ 2,411,000 | $ 2,066,000 |
| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of valuation reserve for inventory. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|