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Accumulated Other Comprehensive Loss (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Accumulated other comprehensive loss, net of taxes        
Balance at the beginning of the period     $ (767,569)  
Other comprehensive income (loss) before reclassifications     135,003  
Amount reclassified from AOCI     552,085  
Net other comprehensive income (loss) 227,753   687,088  
Balance at the end of the period (80,481)   (80,481)  
Realized gain/(loss) on sale of marketable securities (58,289)   (552,085)  
Net loss (4,590,961) (3,705,459) (8,367,818) (4,931,128)
Foreign Currency Translation
       
Accumulated other comprehensive loss, net of taxes        
Balance at the beginning of the period     (130,791)  
Other comprehensive income (loss) before reclassifications     34,327  
Net other comprehensive income (loss)     34,327  
Balance at the end of the period (96,464)   (96,464)  
Unrealized Gain (Loss) on Available-for-Sale Securities
       
Accumulated other comprehensive loss, net of taxes        
Balance at the beginning of the period     (636,778)  
Other comprehensive income (loss) before reclassifications     100,676  
Amount reclassified from AOCI     552,085  
Net other comprehensive income (loss)     652,761  
Balance at the end of the period 15,983   15,983  
Unrealized Gain (Loss) on Available-for-Sale Securities | Reclassification from AOCI
       
Accumulated other comprehensive loss, net of taxes        
Realized gain/(loss) on sale of marketable securities     (552,085)  
Net loss     $ (552,085)