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Subsequent Events (Details) (USD $)
 1 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 3 Months Ended 6 Months Ended 9 Months Ended 1 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Oct. 31, 2012
May 02, 2012
Nov. 30, 2009
Nov. 30, 2008
Sep. 30, 2012
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Sep. 30, 2012
Subsequent event [Member]
Sep. 30, 2012
Warrant liabilities [Member]
Dec. 31, 2012
Series A Warrants [Member]
Sep. 30, 2012
Series A Warrants [Member]
Jun. 30, 2012
Series A Warrants [Member]
Sep. 30, 2012
Series A Warrants [Member]
May 02, 2012
Series B Warrant [Member]
Nov. 30, 2009
Series B Warrant [Member]
Nov. 30, 2008
Series B Warrant [Member]
Jun. 30, 2012
Series B Warrant [Member]
Sep. 30, 2012
Series B Warrant [Member]
Dec. 31, 2011
Series B Warrant [Member]
Subsequent events (Textual) [Abstract]                                        
Number of warrants exercised           688,171           1,445,400   1,445,400       2,700,000 2,700,000  
Gross proceeds   $ 5,300,000     $ 3,375,000 $ 4,153,584     $ 963,000   $ 1,045,660 $ 977,900     $ 5,300,000 $ 12,500,000 $ 20,000,000   $ 3,375,000 $ 10,000,000
Number of shares of common stock                       1,445,400 2,700,000 1,445,400   0.40 0.75   2,700,000  
Warrants issued                           2,700,000         2,700,000  
Exercise price of warrant     15.00 23.00   1.40                            
Common Stock, Shares, Outstanding         35,018,336 35,018,336   22,427,955                        
Number of shares of common stock 1,691,410                 688,171                    
Sale of stock, price per share $ 2.20       $ 2.10                              
Gross proceeds from common stock $ 3,714,000       $ 16,738,000 $ 16,196,587 $ 10,426,121                          
The sales agent is paid compensation equal to 3% of gross proceeds 3.00%         3.00%