Note J - Treasury Stock (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Stock Repurchase Program, Authorized Amount	$ 18,000,000		$ 18,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 716,000		$ 716,000
Treasury Stock, Shares, Acquired (in shares)	0	68,570	0	115,365