Derivative Liabilities (Details) (USD $)					9 Months Ended	12 Months Ended	9 Months Ended		12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Apr. 30, 2013 Warrant [Member]	Jul. 31, 2012 Warrant [Member]	Jul. 31, 2011 Warrant [Member]	Jun. 30, 2011 Warrant [Member]	Apr. 30, 2013 Warrants Isssued August 2012 [Member]	Jul. 31, 2012 Warrants Isssued February 2012 [Member]	Apr. 30, 2013 Warrants Isssued December 2012 [Member]	Apr. 30, 2013 Additional Warrants [Member]	Jul. 31, 2012 Additional Warrants [Member]	Apr. 30, 2013 Warrant Fair Value [Member]	Jul. 31, 2012 Warrant Fair Value [Member]	Apr. 30, 2013 Warrant Exercised [Member]	Jul. 31, 2012 Warrant Exercised [Member]
Balance - Derivative warrant liability	$ 3,436,312	$ 4,081,627	$ 8,745,508
Additional warrants issued in financing					624,797	1,811,746	762,355	7,484,550	1,548,813	(6,400,428)	(793,706)	(3,116,589)	(7,230,734)
Balance - Derivative warrant liability Value	$ 3,436,312	$ 4,081,627	$ 8,745,508
Outstanding, August 1, 2012	215,337,526	55,148,530	55,148,530	80,234,017
Warrants Issued					9,375,000	13,333,333	24,999,999	236,219,094	11,444,440
Warrants Exercised												(110,405,097)	(49,863,260)
Balance - Derivative warrant liability	215,337,526	55,148,530	55,148,530	80,234,017