Patent and Patent Applications (Details) (USD $)	9 Months Ended	12 Months Ended
Apr. 30, 2013	Jul. 31, 2011 Patents [Member]
Intellectual property, estimated useful life	20 years
Warrants Issued During Period, Number of Warrants		7,116,667
Investment Warrants, Exercise Price (in Dollars per share)		$ 0.25

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration