Stockholders' Equity (Summary Of Stock Option Activity) (Details) - USD ($)	12 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Comprehensive Loss [Abstract]
Outstanding, Shares, Beginning Balance	462,343	443,755
Granted		300,000
Cancelled	(28,125)	(281,412)
Outstanding, Shares, Ending Balance	434,218	462,343
Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 3.95	$ 9.52
Weighted Average Exercise Price, Granted		1.40
Weighted Average Exercise Price, Cancelled	2.20	10.01
Outstanding, Weighted Average Exercise Price, Ending Balance	$ 4.07	$ 3.95
Aggregate Intrinsic Value, Outstanding		$ 22,000