Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	279,792	233,628
Contract with Customer, Refund Liability	$ 400,000
Sales, Royalty and Licensing Revenue	2,500,000	$ 1,800,000
Royalty Expense	$ 92,000	$ 89,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross (in shares)	0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	0	15,000
Share-Based Payment Arrangement, Expense	$ 300,000	$ 300,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Net Asset (Liability)	(512,000)			$ 590,000
Fair Value, Inputs, Level 2 [Member] | Line of Credit [Member]
Debt Instrument, Fair Value Disclosure	5,400,000		$ 3,400,000
Fair Value, Inputs, Level 2 [Member] | Term Loan [Member]
Debt Instrument, Fair Value Disclosure	9,200,000		9,200,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Net Asset (Liability)	$ 0		$ 0