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Intangible Assets (Details 1) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Estimated amortization expense of intangible assets    
2012 (remaining six months) $ 70,714  
2013 141,439  
2014 140,520  
2015 131,769  
2016 124,698  
2017 121,263  
Thereafter 710,575  
Finite-Lived Intangible Assets, Net Carrying Amount $ 1,440,978 $ 1,432,895