Note A - Organization and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Numerator
Net income	$ 7,235	$ 9,546
Denominator
Basic weighted average common shares outstanding (in shares)	6,576,711	6,523,555
Dilutive effect of stock options and restricted stock shares (in shares)	79,000	117,000
Diluted weighted average common shares outstanding (in shares)	6,655,573	6,640,728
Basic net income per common share (in dollars per share)	$ 1.10	$ 1.46
Diluted net income per common share (in dollars per share)	$ 1.09	$ 1.44