Quarterly report pursuant to sections 13 or 15(d)

Significant Accounting Policies (Details 2)

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Significant Accounting Policies (Details 2) (USD $)
9 Months Ended 63 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2013
Apr. 30, 2012
Apr. 30, 2013
Apr. 30, 2013
Research and development expense
Non-employees
Apr. 30, 2012
Research and development expense
Non-employees
Apr. 30, 2013
Research and development expense
Non-employees
Apr. 30, 2012
Research and development expense
Non-employees
Apr. 30, 2013
General and administrative expense
Non-employees
Apr. 30, 2012
General and administrative expense
Non-employees
Apr. 30, 2013
General and administrative expense
Non-employees
Apr. 30, 2012
General and administrative expense
Non-employees
Stock options to non-employees                      
Stock-based compensation expense recognized $ 34,500 $ 249,000 $ 366,500 $ 3,000 $ 8,000 $ 9,000 $ 8,000 $ 62,000 $ 25,000 $ 236,000 $ 25,000