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 6 Months Ended 9 Months Ended 12 Months Ended 75 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Jul. 31, 2008
Apr. 30, 2014
Apr. 30, 2013
Jul. 31, 2013
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2010
Jul. 31, 2009
Apr. 30, 2014
Cash and Cash Equivalents and Liquidity                      
Losses in all previous reporting periods from inception to date $ 3,816,844 $ 1,728,659 $ 7,187 $ 8,468,760 $ 5,377,572 $ 7,150,187 $ 2,364,852 $ 3,758,817 $ 36,158 $ 33,714 $ 21,819,675
Cash and cash equivalents $ 24,252,154 $ 7,392,272   $ 24,252,154 $ 7,392,272 $ 4,970,175 $ 5,141,509       $ 24,252,154