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Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Line of Credit Facility [Line Items]    
Capital lease obligations $ 750,216 $ 0
Long-term debt, including capital lease obligations 89,750,216 97,693,750
Less unamortized debt issuance costs (1,804,390) (1,555,992)
Long-term debt 87,945,826 96,137,758
Long-term debt 87,945,826 96,137,758
Less current installments (1,484,048) (3,112,500)
Long-term debt, net of current portion 86,461,778 93,025,258
Term Loan [Member]    
Line of Credit Facility [Line Items]    
Long-term debt $ 89,000,000 97,693,750
Revolving Credit Loan [Member]    
Line of Credit Facility [Line Items]    
Revolving credit facility   $ 0