Note 1 - Business Activity and Summary of Significant Accounting Policies 1 (Details Textual) - USD ($) |
12 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Accounts Receivable, Allowance for Credit Loss | $ 298,000 | $ 436,000 |
| Inventory Valuation Reserves | 2,317,000 | 1,413,000 |
| Advertising Expense | 4,000 | 34,000 |
| Intangible Asset, Excluding Goodwill, after Accumulated Amortization | 305,000 | $ 364,000 |
| Impairment of Intangible Assets (Excluding Goodwill) | $ 0 | |
| Minimum [Member] | ||
| Finite-Lived Intangible Asset, Useful Life (Year) | 11 years | |
| Product Warranty Obligation, Term (Year) | 1 year | |
| Maximum [Member] | ||
| Finite-Lived Intangible Asset, Useful Life (Year) | 20 years | |
| Product Warranty Obligation, Term (Year) | 3 years | |
| Inventory Acquired From Supplier [Member] | ||
| Inventory, Gross | $ 1,500,000 | |
| X | ||||||||||
- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| 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
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| X | ||||||||||
- Definition Amount of impairment loss for finite- and indefinite-lived intangible assets and capitalized cost for software to be sold, leased, or marketed. Excludes goodwill. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, after accumulated amortization, of finite- and indefinite-lived intangible assets and capitalized cost for software to be sold, leased, or marketed. Excludes goodwill. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. 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
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| X | ||||||||||
- Definition Term of warranty or group of similar warranties, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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