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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended | 8 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Contract with Customer, Refund Liability | $ 0 |  |  | $ 0 |  |
Sales, Royalty and Licensing Revenue | 2,700,000 | $ 2,300,000 |  | 6,600,000 | $ 5,200,000 |
Royalty Expense | $ 96,000 | $ 107,000 |  | $ 278,000 | $ 213,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | 0 | 0 |  | 0 | 0 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 151,500 | 118,000 |  | 166,500 | 118,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares) | 3,000 | 5,999 |  | 3,000 | 5,999 |
Share-Based Payment Arrangement, Expense | $ 300,000 | $ 300,000 | $ 700,000 | $ 900,000 |  |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | 900,000 |  |  | 900,000 |  | $ 600,000
Deferred Compensation Arrangement with Individual, Cash Award Forfeited, Amount | $ 0 | $ 0 |  | $ 0 | $ 0 |
Restricted Stock [Member] |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 173,230 | 227,082 |  | 215,180 | 151,585 |

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