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, 2018	Jun. 30, 2017
Numerator
Net income	$ 5,051	$ 7,235
Denominator
Basic weighted average common shares outstanding (in shares)	6,640,583	6,576,711
Dilutive effect of stock options and restricted stock shares (in shares)	245,000	79,000
Diluted weighted average common shares outstanding (in shares)	6,886,126	6,655,573
Basic net income per common share (in dollars per share)	$ 0.76	$ 1.10
Diluted net income per common share (in dollars per share)	$ 0.73	$ 1.09