Note A - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Jun. 30, 2025
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	107,845	158,319	149,185	238,739
Contract with Customer, Refund Liability	$ 0		$ 0		$ 11,000
Sales, Royalty and Licensing Revenue	1,700,000	$ 1,700,000	5,300,000	$ 6,000,000
Royalty Expense	$ 56,000	$ 56,000	$ 177,000	$ 210,000
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 Forfeited, Amount	$ 17,000	$ 0	$ 17,000	$ 0
Share-Based Payment Arrangement, Expense	100,000	200,000	500,000	800,000
Deferred Compensation Arrangement with Individual, Cash Award Granted, Amount	900,000	$ 200,000	900,000	$ 200,000
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net			0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net			0		0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Net Asset (Liability)	0		0		0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Net Asset (Liability)	(287,000)		(287,000)		(1,599,000)
Fair Value, Inputs, Level 2 [Member] | Line of Credit [Member]
Debt Instrument, Fair Value Disclosure	10,000,000		10,000,000		1,900,000
Fair Value, Inputs, Level 2 [Member] | Term Loan [Member]
Debt Instrument, Fair Value Disclosure	8,700,000		8,700,000		$ 8,900,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Net Asset (Liability)	$ 0		$ 0
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)	139,000	24,000	139,000	24,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)	10,665	0	10,665	0
The 2020 Omnibus Stock Incentive Plan [Member] | Scenario, Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Plan Term Extension (Year)	5 years		5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized (in shares)			550,000