Quarterly report pursuant to Section 13 or 15(d)

INTANGIBLE ASSETS - Future amortization of current intangible assets (Details)

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INTANGIBLE ASSETS - Future amortization of current intangible assets (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Future amortization of intangible assets, net    
2016 $ 5,440,463  
2017 5,251,025  
2018 3,691,108  
2019 2,846,570  
2020 2,121,609  
2021 and thereafter 3,857,523  
Total 23,208,298  
Amortization expense $ 2,025,899 $ 2,598,461