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Goodwill and Intangible Assets - Narrative (Details) - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Goodwill and Intangible Assets (Textual) [Abstract]    
Aggregate amortization expense on intangible assets $ 404,062 $ 406,299
Estimated aggregate amortization expense for remainder of 2018 846,000  
Estimated aggregate amortization expense for 2019 1,100,000  
Estimated aggregate amortization expense for 2020 547,000  
Estimated aggregate amortization expense for 2021 520,000  
Estimated aggregate amortization expense for 2022 493,000  
Estimated aggregate amortization expense for 2023 and the years after $ 2,100,000