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Goodwill and Intangible Assets (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of intangible assets $ 942,719us-gaap_AmortizationOfIntangibleAssets $ 1,770,537us-gaap_AmortizationOfIntangibleAssets $ 1,821,170us-gaap_AmortizationOfIntangibleAssets
Goodwill, impairment loss $ 0us-gaap_GoodwillImpairmentLoss $ 0us-gaap_GoodwillImpairmentLoss $ 0us-gaap_GoodwillImpairmentLoss