Note J - Treasury Stock - Treasury Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Treasury Stock Acquired, Shares (in shares)	189,702	182,867	190,394	418,949
Treasury Stock Acquired, Average Cost (in dollars per share)
Treasury Stock Acquired, Total Cost	$ 2,527	$ 1,758	$ 2,537	$ 3,501
Stock Repurchase Plan [Member]
Treasury Stock Acquired, Shares (in shares)	189,702	144,681	189,702	380,071
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 13.32	$ 9.67	$ 13.32	$ 8.25
Treasury Stock Acquired, Total Cost	$ 2,527	$ 1,398	$ 2,527	$ 3,136
Stock Repurchased in Connection with Stock Option Exercised [Member]
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 0	$ 9.95	$ 0	$ 9.95
Shares acquired in connection with stock option exercises, shares (in shares)	0	30,442	0	30,442
Shares acquired in connection with stock option exercises, cost	$ 0	$ 303	$ 0	$ 303
Stock Repurchased from Employee for Restricted Stock Vesting [Member]
Treasury Stock Acquired, Shares (in shares)	0	7,744	692	8,436
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 0	$ 7.40	$ 14.20	$ 7.34
Treasury Stock Acquired, Total Cost	$ 0	$ 57	$ 10	$ 62