Quarterly report pursuant to Section 13 or 15(d)

Public Offering (Details)

v2.4.0.8
Public Offering (Details) (USD $)
0 Months Ended 0 Months Ended
Sep. 18, 2013
Apr. 30, 2014
Maximum
Aug. 16, 2013
Placement Agents
Sep. 18, 2013
Warrants issued with September 2013 Public Offering
Sep. 18, 2013
Warrants issued with September 2013 Public Offering
H.C. Wainwright
Aug. 16, 2013
Warrants issued with September 2013 Public Offering
H.C. Wainwright
Aug. 16, 2013
Warrants issued with September 2013 Public Offering
H.C. Wainwright
Maximum
Sep. 18, 2013
Warrants issued with September 2013 Public Offering
Maxim
Sep. 18, 2013
Warrants issued with September 2013 Public Offering
Placement Agents
Aug. 16, 2013
Warrants issued with September 2013 Public Offering
Placement Agents
Shares issued in offering 47,792,000                  
Aggregate number of shares of common stock the warrants can purchase       23,896,000            
Proceeds from issuance of common stock and warrants $ 11,950,000                  
Net, proceeds from issuance of common stock and warrants 11,100,000                  
Number of shares of common stock entitled to be purchased as a percentage of shares issued to such investor       50.00%            
Exercise price of warrants (in dollars per share)   $ 1.20   $ 0.35         $ 0.3125  
Term of warrants       4 years            
Placement agent and financial advisory services fees as a percentage of the offering proceeds           6.00%        
Non-accountable expense allowance as a percentage of gross proceeds of offering           1.00%        
Placement agent fees (as a percent)     20.00%              
Percentage of warrants paid to placement agents             5.00%      
Warrants issued to placement agents (in shares)         1,911,680     477,920   2,389,600
Fair value of warrants       $ 2,461,008         $ 410,535  
Dividend yield (as a percent)       0.00%         0.00%  
Volatility rate (as a percent)       83.62%         94.57%  
Risk-free interest rate (as a percent)       1.43%         1.43%