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