Note J - Treasury Stock - Treasury Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Treasury Stock Acquired, Shares (in shares)	206,971	44,132	397,365	463,081
Treasury Stock Acquired, Average Cost (in dollars per share)
Treasury Stock Acquired, Total Cost	$ 2,568	$ 639	$ 5,105	$ 4,140
Stock Repurchase Plan [Member]
Treasury Stock Acquired, Shares (in shares)	179,810	5,751	369,512	385,822
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 12.62	$ 10.60	$ 12.98	$ 8.28
Treasury Stock Acquired, Total Cost	$ 2,269	$ 61	$ 4,797	$ 3,197
Stock Repurchased in Connection with Stock Option Exercised [Member]
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 0		$ 0	$ 9.95
Shares acquired in connection with stock option exercises, shares (in shares)	0		0	30,442
Shares acquired in connection with stock option exercises, cost	$ 0		$ 0	$ 303
Stock Repurchased from Employee for Restricted Stock Vesting [Member]
Treasury Stock Acquired, Shares (in shares)	27,161	38,381	27,853	46,817
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 11.00	$ 15.05	$ 11.08	$ 13.66
Treasury Stock Acquired, Total Cost	$ 299	$ 578	$ 308	$ 640