Note A - Organization and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Numerator
Net income	$ 1,213	$ 487
Denominator
Basic weighted average common shares outstanding (in shares)	6,520,667	6,835,691
Dilutive effect of stock options (in shares)	174,000	38,000
Diluted weighted average common shares outstanding (in shares)	6,695,319	6,873,951
Basic net income per common share (in dollars per share)	$ 0.19	$ 0.07
Diluted net income per common share (in dollars per share)	$ 0.18	$ 0.07