Note A - Basis of Presentation and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Numerator
Net Income	$ 2,466	$ 1,868	$ 4,956	$ 3,081
Denominator
Basic weighted average common shares outstanding (in shares)	6,567,468	6,509,893	6,562,932	6,515,280
Dilutive effect of stock options (in shares)	116,000	119,000	102,000	147,000
Diluted weighted average common shares outstanding (in shares)	6,683,356	6,628,752	6,665,159	6,662,036
Basic net income per common share (in dollars per share)	$ 0.38	$ 0.29	$ 0.76	$ 0.47
Diluted net income per common share (in dollars per share)	$ 0.37	$ 0.28	$ 0.74	$ 0.46