Note J - Shareholders' Equity (Details Textual) - $ / shares	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Common Stock, Shares, Outstanding (in shares)	13,995,024	13,818,068
Treasury Stock, Common, Shares (in shares)	637,778	814,734
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture (in shares)	176,956	145,725
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)	2,413	0
Treasury Stock, Shares, Acquired (in shares)	0	0
Share Repurchase Program, Remaining Authorized, Number of Shares (in shares)	315,000	315,000
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.12	$ 0
Preferred Stock, Shares Authorized (in shares)	200,000	200,000
Preferred Stock, Shares Issued (in shares)	0	0
Preferred Stock, Capital Shares Reserved for Future Issuance (in shares)	150,000