Annual report pursuant to section 13 and 15(d)

Private Placements and Public Offering (Details 2)

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Private Placements and Public Offering (Details 2) (USD $)
1 Months Ended 12 Months Ended 54 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
Jun. 30, 2011
Mar. 31, 2011
Jul. 31, 2012
Jul. 31, 2011
Jul. 31, 2012
Mar. 28, 2012
Jun. 24, 2011
Mar. 31, 2012
Warrants
Jul. 31, 2012
Warrants
Jul. 31, 2011
Warrants
Mar. 28, 2012
Warrants
Jul. 31, 2012
Warrants issued with March 2011 Private Placement
Derivative Liabilities                        
Estimated fair value of derivative liabilities           $ 657,604           $ 3,808,590
Total proceeds of private placement 3,000,000 1,092,000                   3,000,000
Fair value of derivative liabilities in excess of proceeds       (808,590) (808,590)             808,590
Adjustments to fair value of derivative liabilities     $ 4,192,781 $ (1,041,795) $ 3,150,986       $ 4,192,781 $ (1,041,795)    
Derivative liabilities valuation assumptions using Monte Carlo valuation model                        
Closing price per share of common stock (in dollars per share)           $ 0.25 $ 0.75     $ 0.93 $ 0.22  
Exercise price per share (in dollars per share)                   $ 1.20 $ 0.50  
Expected volatility (as a percent)               125.00%   91.60%    
Risk-free interest rate (as a percent)               1.05%   1.35%    
Floor price (in dollars per share)                   $ 0.50 $ 0.50  
Remaining expected term of underlying securities               4 years 2 months 26 days   4 years 10 months 24 days