Quarterly report pursuant to sections 13 or 15(d)

Private Placements and Public Offerings (Details 2)

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Private Placements and Public Offerings (Details 2) (USD $)
1 Months Ended 3 Months Ended 6 Months Ended 60 Months Ended 6 Months Ended 0 Months Ended
Jun. 30, 2011
Mar. 31, 2011
Jan. 31, 2012
Jan. 31, 2012
Jan. 31, 2013
Dec. 12, 2012
Mar. 28, 2012
Jun. 24, 2011
Jan. 31, 2012
Warrants
Mar. 28, 2012
Warrants
Jun. 24, 2011
Warrants issued with March 2011 Private Placement
Mar. 28, 2012
Series A Warrant
Derivative Liabilities                        
Estimated fair value of derivative liabilities     $ 2,270,934 $ 2,270,934     $ 657,604       $ 3,808,590 $ 657,604
Total proceeds of private placement 3,000,000 1,092,000                    
Fair value of derivative liabilities in excess of proceeds         (808,590)           808,590  
Adjustments to fair value of derivative liabilities     $ (1,397,967) $ 2,579,451 $ 3,150,985              
Derivative liabilities valuation assumptions using Monte Carlo valuation model                        
Closing price per share of common stock (in dollars per share)               $ 0.75 $ 0.76      
Exercise price per share (in dollars per share)                 $ 1.20 $ 0.50    
Expected volatility (as a percent)                 100.10%      
Risk-free interest rate (as a percent)                 0.71%      
Floor price (in dollars per share)           $ 0.26     $ 0.50      
Remaining expected term of underlying securities                 4 years 4 months 24 days