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Stockholders' Deficiency (Details 2)
9 Months Ended
Jul. 31, 2012
Apr. 30, 2013
Warrant [Member]
Outstanding, August 1, 2012 74,264,078 74,264,078
Add: Issued   270,594,093
Less: Exercised   111,803,243
Less: Expired   175,000
Balance - Derivative warrant liability 74,264,078 232,879,928