Sales Concentration (Details) (USD $)	12 Months Ended
Jul. 31, 2012	Jul. 31, 2011
Concentration Risks, Types, No Concentration Percentage [Abstract]
Sales Revenue, Goods, Net	$ 812,000	$ 454,000
Concentration Risk, Customer	two	one
Concentration Risk, Percentage	67.00%	46.00%
Concentration Risk, Geographic	The geographic breakdown of net product sales was as follows: 92% U.S. and 8% foreign.	The geographic breakdown of net product sales was as follows: 87% U.S. and 13% foreign.

Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures).

+ References+ Details

Description of risks that arise due to concentrations of operating facilities, revenues, assets, customers, vendors or the like in a certain geographic area, either domestic or foreign. The description may address risks inherent in the geographic area, and, at a minimum, informs users of the general nature of the risk, but excludes "Information about Geographic Areas" that may be disclosed elsewhere (for instance, segment disclosures)..

+ References+ Details