Quarterly report pursuant to sections 13 or 15(d)

Private Placements and Public Offering (Details)

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Private Placements and Public Offering (Details) (USD $)
1 Months Ended 8 Months Ended 57 Months Ended 1 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2012
Jun. 30, 2011
item
Mar. 31, 2011
USDperunit
Mar. 28, 2012
Oct. 31, 2012
Jul. 31, 2012
Jun. 24, 2011
Mar. 18, 2011
sharesperunit
Mar. 02, 2011
Feb. 28, 2011
Mar. 31, 2012
Rodman
Mar. 31, 2012
Roth
Mar. 31, 2012
Placement Agents
Mar. 28, 2012
Placement Agents
Jun. 30, 2011
Maximum
Oct. 31, 2012
Maximum
Dec. 31, 2011
Warrants
Jun. 24, 2011
Warrants issued with March 2011 Private Placement
Jun. 30, 2011
Warrants issued with March 2011 Private Placement
Mar. 31, 2011
Warrants issued with March 2011 Private Placement
Mar. 18, 2011
Warrants issued with March 2011 Private Placement
Jun. 30, 2011
Series A Warrant
Jun. 24, 2011
Series A Warrant
Jun. 30, 2011
Series B Warrant
Jun. 24, 2011
Series B Warrant
Jun. 24, 2011
Series C Warrant
Mar. 31, 2012
Warrants issued with March 2012 Public Offering
Oct. 31, 2012
Warrants issued with March 2012 Public Offering
Mar. 28, 2012
Warrants issued with March 2012 Public Offering
Number of units issued under private placement   4,000,000 1,456,000                                                    
Shares issued in offering 31,000,000                                                   31,000,000    
Purchase price of units issued under private placement (in dollars per unit)     0.75                                                    
Common stock, purchase price (in dollars per share)             $ 0.75                                            
Proceeds from private placement   $ 3,000,000 $ 1,092,000                             $ 3,000,000                      
Composition of private placement unit, number of shares of common stock               1                                          
Composition of private placement unit, number of warrants to purchase common stock                                         1                
Number of common shares that can be acquired upon exercise of each whole warrant               1                                          
Exercise price of warrants (in dollars per share)                           $ 0.3125   $ 1.20 $ 0.50       $ 1.00   $ 1.20   $ 0.75 $ 1.20     $ 0.35
Term of warrants                                       5 years   5 years   5 years       5 years  
Fair value of warrants                           276,980             431,981             3,206,486  
Volatility rate (as a percent)                         125.00%             89.68%             125.00%    
Risk-free interest rate (as a percent)                         1.05%             2.11%             1.05%    
Number of series of warrants   3                                                      
Number of common shares that can be acquired upon exercise of warrants       31,000,000     12,000,000                                            
Aggregate net proceeds from sale of common stock and Warrants   2,790,000                                                      
Number of shares of common stock entitled to be purchased as a percentage of shares issued to such investor                                     100.00%               100.00%    
Period from date of closing for filing registration statement under Registration Rights Agreement   30 days                                                      
Penalty for non-compliance of Registration Rights Agreement as a percentage of aggregate net proceeds of private placement                             9.00%                            
Placement agent fees as a percentage of offering proceeds 6.00% 6.00%                                                      
Placement agent fees   180,000                                                      
Reimbursement of expenses to lead placement agent   30,000                                                      
Total cash fees paid to placement agents   210,000   542,500 542,500                                                
Percentage of placement agent warrants paid to Roth Capital Partners, LLC 5.00% 6.00%                   30.00%                                  
Warrants issued to placement agents (in shares) 1,550,000 240,000                 1,085,000 465,000                                  
Par value of shares shown as a reduction to paid-in capital   400                                                      
Common stock, par value (in dollars per share)         $ 0.0001 $ 0.0001 $ 0.0001   $ 0.0001 $ 0.001                                      
Proceeds from public offering 7,750,000                                                        
Proceeds from public offering, net of offering costs $ 7,200,000                                                        
Non-accountable expense allowance as a percentage of gross proceeds of offering                     1.00%