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Subsequent Events (Details) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2012
May 02, 2012
Nov. 30, 2009
Nov. 30, 2008
Jun. 30, 2012
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Jun. 30, 2012
Warrant liabilities [Member]
Jun. 30, 2012
Series A Warrant [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]
Jun. 30, 2012
Series B Warrant [Member]
Dec. 31, 2011
Series B Warrant [Member]
Subsequent events (Textual) [Abstract]                                
Number of warrants exercised                   615,000       1,800,000 2,700,000  
Gross proceeds $ 861,000 $ 5,300,000     $ 3,375,000 $ 3,194,202         $ 5,300,000 $ 12,500,000 $ 20,000,000   $ 2,250,000 $ 10,000,000
Number of shares of common stock                   2,700,000   0.40 0.75   1,800,000  
Warrants issued                   2,700,000         1,800,000  
Exercise price of warrant     15.00 23.00   1.40                    
Common Stock, Shares, Outstanding         25,377,631 25,377,631   22,427,955                
Number of shares of common stock           4,207,361     615,000              
Sale of Stock, Price Per Share           $ 2.06                    
Proceeds from Issuance of Common Stock           $ 8,657,000 $ 9,524,758                  
The sales agent is paid compensation equal to 3% of gross proceeds           3.00%