Note A - Basis of Presentation and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income Per Common Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Numerator
Net income	$ 1,081	$ 194	$ 1,568	$ 282
Denominator
Basic weighted average common shares outstanding (in shares)	6,808,229	6,817,363	6,821,960	6,816,928
Dilutive effect of stock options (in shares)	54,000	33,000	46,000	30,000
Diluted weighted average common shares outstanding (in shares)	6,862,369	6,850,356	6,868,160	6,847,172
Basic net income per common share (in dollars per share)	$ 0.16	$ 0.03	$ 0.23	$ 0.04
Diluted net income per common share (in dollars per share)	$ 0.16	$ 0.03	$ 0.23	$ 0.04