Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022
Contract with Customer, Refund Liability, Total	$ 0		$ 0
Sales, Royalty and Licensing Revenue	2,300,000	$ 4,800,000	5,200,000	$ 13,500,000
Royalty Expense	$ 107,000	$ 200,000	$ 213,000	$ 600,000
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	$ 0.6	$ 0.3	$ 0.6	$ 0.3
Deferred Compensation Arrangement with Individual, Cash Award Forfeited, Amount	0	$ 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)	118,000	126,850	118,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)	5,999	1,400	5,999	19,832
Share-Based Payment Arrangement, Expense	$ 300,000	$ 300,000	$ 700,000	$ 700,000
Restricted Stock 1 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	227,082	126,850	151,585	126,850