Note I - Shareholders' Equity (Details Textual) - $ / shares $ / shares in Thousands	12 Months Ended		24 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022
Common Stock, Shares, Outstanding, Ending Balance (in shares)	13,672,343	13,648,663	13,672,343
Treasury Stock, Shares, Total (in shares)	960,459	984,139	960,459
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture, Total (in shares)	57,204	249,480
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)	29,810	6,809
Treasury Stock, Shares, Acquired (in shares)			0
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares)	315,000	315,000	315,000
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0	$ 0
Preferred Stock, Shares Authorized (in shares)	200,000	200,000	200,000
Preferred Stock, Shares Issued, Total (in shares)	0	0	0
Preferred Stock, Capital Shares Reserved for Future Issuance (in shares)	150,000		150,000