Basic And Diluted Net Income Per Common Share (Schedule Of Basic And Diluted Net Income Per Common Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Basic And Diluted Net Income Per Common Share [Abstract]
Net income	$ 356	$ 389
Weighted-average common shares outstanding	17,424	17,152
Effect of dilutive stock options and warrants	505	452
Diluted weighted-average common shares outstanding	17,929	17,604
Basic	$ 0.02	$ 0.02
Diluted	$ 0.02	$ 0.02