Income Taxes - Deferred income taxes (Details) (USD $)	Jul. 31, 2014	Jul. 31, 2013
Income Tax Disclosure [Abstract]
Net operating loss carryforwards	$ 90,515,261	$ 87,541,552
Other temporary differences	299,010	800,989
Intangible assets	291,002
Total Deferred Tax Assets	91,105,273	88,342,541
Valuation Allowance	(91,105,273)	(88,098,860)
Intangible assets		(386,320)
Other temporary differences		142,639
Total Deferred Tax Liabilities		(243,681)
Net Deferred Income Taxes