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Marketable Securities and Fair Value Measurements (Details Textual) (USD $)
 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended 1 Months Ended 9 Months Ended 12 Months Ended 1 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Sep. 30, 2012
First warrant [Member]
Sep. 30, 2012
First warrant [Member]
Sep. 30, 2012
Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Dec. 31, 2011
Using Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Sep. 30, 2012
Using Significant Unobservable Inputs (Level 3) [Member]
Warrant
Dec. 31, 2011
Using Significant Unobservable Inputs (Level 3) [Member]
Warrant
Sep. 30, 2012
Using Significant Unobservable Inputs (Level 3) [Member]
First warrant [Member]
Sep. 30, 2012
Using Significant Unobservable Inputs (Level 3) [Member]
First warrant [Member]
Dec. 31, 2011
Using Significant Unobservable Inputs (Level 3) [Member]
First warrant [Member]
Mar. 31, 2012
Using Significant Unobservable Inputs (Level 3) [Member]
First warrant [Member]
Sep. 30, 2011
Using Significant Unobservable Inputs (Level 3) [Member]
First warrant [Member]
Mar. 31, 2012
Using Significant Unobservable Inputs (Level 3) [Member]
Second warrant [Member]
Sep. 30, 2012
Using Significant Unobservable Inputs (Level 3) [Member]
Second warrant [Member]
Marketable Securities and Fair Value Measurements (Textual) [Abstract]                                    
Number of shares held in an affiliated entity               8,220,775 8,220,775                  
Common stock purchase warrant                             1,000,000 1,000,000 3,000,000  
Term of the warrants in years                         5 years 5 years       5 years
Exercise price of a five-year warrant                       $ 1.20         $ 1.00  
Change in the fair value $ 1,100,000 $ (347,000) $ 987,000 $ (7,600,000)   $ 11,000 $ (80,000)     $ 986,629                
Expiration of warrants date range start                   July 2014                
Expiration of warrants date range end                   December 2016                
Number of warrants received to purchase shares of common stock                   2 1              
Marketable Securities and Fair Value Measurements (Additional Textual) [Abstract]                                    
Long-term asset associated with warrants 521,000   521,000                              
Gain on sale of asset     501,000                              
Common stock warrants $ 6,162,948   $ 6,162,948   $ 5,176,319