Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) - USD ($)
3 Months Ended 93 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2015
Stockholders' Equity      
Stockholders' equity at beginning of period $ 32,695,621 $ 38,068,058  
Net loss (7,037,391) (4,061,116) $ (53,600,000)
Stock-based compensation 1,562,066 611,240  
Stockholders' equity at end of period $ 27,220,296 $ 34,618,182 $ 27,220,296