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