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Schedule of Long-Term Debt Obligations (Detail) - USD ($)
6 Months Ended
Jun. 30, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Long term debt $ 49,181,644 $ 46,130,597
Less: Current portion of long-term debt (9,028,572) (4,601,320)
Long-term debt 40,153,072 41,529,277
Senior Lender    
Debt Instrument [Line Items]    
Note payable 27,361,606 28,375,000
Line of credit 14,500,000 10,500,000
Unamortized loan origination costs $ (579,962) (644,403)
Senior Lender | Note Payable    
Debt Instrument [Line Items]    
Debt instrument, effective interest rate [1] 4.30%  
Debt instrument maturity date 2020-12  
Senior Lender | Line of credit    
Debt Instrument [Line Items]    
Debt instrument, effective interest rate [1] 4.30%  
Debt instrument maturity date 2018-12  
Other Lenders | Note Payable Subordinated Note    
Debt Instrument [Line Items]    
Debt instrument, effective interest rate [1] 3.00%  
Debt instrument maturity date 2019-12  
Note payable $ 7,900,000 $ 7,900,000
[1] Effective rate as of June 30, 2016