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Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2022
Contract with Customer, Refund Liability, Total | $ 0 |  | $ 0 |  |
Sales, Royalty and Licensing Revenue | 1,500,000 | $ 4,100,000 | 2,800,000 | $ 8,800,000 |
Royalty Expense | $ 78,000 | $ 163,000 | $ 105,000 | $ 399,000 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares) | 0 | 0 | 0 | 0 |
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount | $ 0 | $ 0 | $ 0 | $ 0 |
Deferred Compensation Arrangement with Individual, Cash Award Forfeited, Amount | 0 | $ 0 |  | $ 191,000 |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Fair Value, Net Asset (Liability), Total | 0 |  | 0 |  | $ 0
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Fair Value, Net Asset (Liability), Total | $ 0 |  | $ 0 |  | $ 0
Restricted Stock [Member] |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares) | 0 | 0 | 0 | 0 |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares) | 0 | 2,100 | 0 | 18,432 |
Share-Based Payment Arrangement, Expense | $ 200,000 | $ 200,000 | $ 500,000 | $ 500,000 |
Restricted Stock 1 [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 50,377 | 0 | 50,377 | 0 |
Share-Based Payment Arrangement, Option [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | 0 | 0 | 0 | 0 |

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