Note I - Stockholders' Equity - Treasury Stock Repurchases (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Treasury Stock Acquired, Shares (in shares)	435,080	463,492
Treasury Stock Acquired, Average Cost (in dollars per share)
Treasury Stock Acquired, Total Cost	$ 5,503	$ 4,147
Stock Repurchase Plan [Member]
Treasury Stock Acquired, Shares (in shares)	406,817	385,822
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 12.76	$ 8.28
Treasury Stock Acquired, Total Cost	$ 5,190	$ 3,197
Stock Repurchased from Employee for Restricted Stock Vesting [Member]
Treasury Stock Acquired, Shares (in shares)	28,263	47,228
Treasury Stock Acquired, Average Cost (in dollars per share)	$ 11.08	$ 13.69
Treasury Stock Acquired, Total Cost	$ 313	$ 647
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