Note I - Stockholders' Equity - Treasury Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Treasury Stock Acquired, Average Cost (in dollars per share)
Treasury Stock Acquired, Total Cost	$ 3,844	$ 3,747
Total, shares (in shares)	463,492	462,700
Total, cost	$ 4,147	$ 3,747
Stock Repurchase Plan [Member]
Treasury Stock Acquired, Shares (in shares)	385,822	400,787
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 8.28	$ 8.25
Treasury Stock Acquired, Total Cost	$ 3,197	$ 3,305
Stock Repurchased in Connection with Stock Option Exercised [Member]
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 9.95
Shares acquired in connection with stock option exercises, shares (in shares)	30,442
Shares acquired in connection with stock option exercises, cost	$ 303
Stock Repurchased from Employee for Restricted Stock Vesting [Member]
Treasury Stock Acquired, Shares (in shares)	47,228	61,913
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 13.69	$ 7.14
Treasury Stock Acquired, Total Cost	$ 647	$ 442