Basic And Diluted Net Income Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012
Basic And Diluted Net Income Per Share [Abstract]
Net income	$ 4	$ 61	$ 117	$ 333
Weighted - average common shares outstanding	8,528	8,006	8,325	7,966
Effect of dilutive stock options and warrants	231	50	173	50
Diluted weighted - average common shares outstanding	8,759	8,056	8,498	8,016
Earnings per share, basic	$ 0.00	$ 0.01	$ 0.01	$ 0.04
Earnings per share, diluted	$ 0.00	$ 0.01	$ 0.01	$ 0.04
Options and warrants that could potentially dilute net income per share in the future that are not included in the computation of diluted net income per share, as their impact is anti-dilutive	280	823	735	823