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Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Line of Credit Facility [Line Items]    
Capital lease obligations $ 735,649 $ 750,216
Long-term debt, including capital lease obligations 86,735,649 89,750,216
Less unamortized debt issuance costs (1,712,641) (1,804,390)
Long-term debt 85,023,008 87,945,826
Long-term debt 85,023,008 87,945,826
Less current installments (58,968) (1,484,048)
Long-term debt, net of current portion 84,964,040 86,461,778
Term Loan [Member]    
Line of Credit Facility [Line Items]    
Long-term debt 86,000,000 89,000,000
Revolving Credit Loan [Member]    
Line of Credit Facility [Line Items]    
Revolving credit facility $ 0 $ 0