Note J - Treasury Stock - Treasury Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Treasury Stock Acquired, Shares (in shares)	49,034	206,971	164,399	397,365
Treasury Stock Acquired, Average Cost (in dollars per share)
Treasury Stock Acquired, Total Cost	$ 444	$ 2,568	$ 1,503	$ 5,105
Stock Repurchase Plan [Member]
Treasury Stock Acquired, Shares (in shares)	25,447	179,810	140,812	369,512
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 9.23	$ 12.62	$ 9.19	$ 12.98
Treasury Stock Acquired, Total Cost	$ 235	$ 2,269	$ 1,294	$ 4,796
Stock Repurchased from Employee for Restricted Stock Vesting [Member]
Treasury Stock Acquired, Shares (in shares)	23,587	27,161	23,587	27,853
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 8.86	$ 11.00	$ 8.86	$ 11.08
Treasury Stock Acquired, Total Cost	$ 209	$ 299	$ 209	$ 309