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Summary of Significant Accounting Policies (Details Textual) (USD $)	9 Months Ended		12 Months Ended			201 Months Ended	210 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010	Jul. 31, 2012	Apr. 30, 2013
Write-off of abandoned patents	$ 0	$ 88,582	$ 440,780	$ 0	$ 0	$ 1,353,976	$ 1,353,976
Impairment of Long-Lived Assets to be Disposed of			2,945,079	35,878	0
Recognition of Deferred Revenue				488,959
Deferred revenue	$ 229,621		$ 263,125	$ 369,748		$ 263,125	$ 229,621

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

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