Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Contract with Customer, Refund Liability	$ 0		$ 0
Sales, Royalty and Licensing Revenue	2,200,000	$ 1,500,000	3,900,000	$ 2,800,000
Royalty Expense	$ 93,000	78,000	$ 182,000	$ 105,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	0		0
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	15,000			0
Share-Based Payment Arrangement, Expense	$ 300,000	$ 200,000	$ 600,000	$ 500,000
Restricted Stock 1 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	238,682	50,377	236,155	50,377