Quarterly report pursuant to Section 13 or 15(d)

Cash and Cash Equivalents and Liquidity (Details)

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Cash and Cash Equivalents and Liquidity (Details) - USD ($)
3 Months Ended 93 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Oct. 31, 2015
Jul. 31, 2015
Jul. 31, 2014
Cash and Cash Equivalents and Liquidity          
Losses in all previous reporting periods from inception to date $ 7,037,391 $ 4,061,116 $ 53,600,000    
Cash and cash equivalents $ 26,896,369 $ 33,989,597 $ 26,896,369 $ 32,035,264 $ 37,852,694