Note 3 - Selected Balance Sheet Information - Inventory Schedule (Details) - USD ($) |
Jun. 30, 2026 |
Jun. 30, 2025 |
|---|---|---|
| Parts inventory | $ 2,595,000 | $ 2,075,000 |
| Work in process | 211,000 | 180,000 |
| Finished goods | 772,000 | 928,000 |
| Estimated inventory to be returned | 469,000 | 393,000 |
| Less: Reserve for obsolescence | (366,000) | (277,000) |
| Total | $ 3,681,000 | $ 3,299,000 |
| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of estimated inventory to be returned. No definition available.
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| 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
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| 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
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