Quarterly Information - Quarterly information (unaudited) (Details) (USD $)	12 Months Ended			3 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Oct. 31, 2013 Q1	Oct. 31, 2012 Q1	Jan. 31, 2014 Q2	Jan. 31, 2013 Q2	Apr. 30, 2014 Q3	Apr. 30, 2013 Q3	Jul. 31, 2014 Q4	Jul. 31, 2013 Q4
Revenues, net			$ 28,651	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Operating Loss	(4,399,679)	(6,129,359)	(10,024,048)	(1,443,051)	(1,940,031)	(1,010,861)	(1,290,780)	(1,242,849)	(1,433,640)	(702,918)	(1,464,908)
Net Income/(Loss)	(1,417)	(8,554,322)	(9,490,278)	530,094	(656,199)	(3,186,290)	(5,640,985)	270,923	1,297,448	2,383,856	(3,554,586)
Net Loss available to common stockholders	$ (2,059,746)	$ (10,276,796)	$ (9,867,024)	$ 530,094	$ (758,496)	$ (3,594,569)	$ (5,640,985)	$ (1,149,127)	$ 1,297,448	$ 2,153,856	$ (5,174,763)
Net Loss per share	$ (0.003)	$ (0.023)	$ (0.030)	$ 0.001	$ 0.002	$ (0.010)	$ (0.015)	$ (0.002)	$ 0.003	$ 0.004	$ (0.007)