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Common Stock (Details) (USD $)
 1 Months Ended 3 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, 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]
Common Stock (Textual) [Abstract]                                  
Common stock,sold         7,956,061                        
Sale of stock, price per share $ 2.20       $ 2.10                        
Proceeds from issuance of common stock, net of issuance costs $ 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%                      
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   $ 1,045,660 $ 977,900     $ 5,300,000 $ 12,500,000 $ 20,000,000   $ 3,375,000 $ 10,000,000
Common stock, shares issued                 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