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Debt - Additional Information (Detail)
3 Months Ended 9 Months Ended
Apr. 08, 2016
USD ($)
Sep. 30, 2013
Sep. 30, 2016
USD ($)
Feb. 15, 2013
USD ($)
Maximum borrowing under PNC facility     $ 50,000,000 $ 40,000,000
PNC Facility effective rate of interest     3.50%  
Interest rate description under PNC facility     Interest charges with respect to loans are computed on the actual principal amount of loans outstanding during the month at a rate per annum equal to (A) with respect to Domestic Rate Loans (as defined in the PNC Facility), the sum of the Alternate Base Rate (as defined in the PNC Facility) plus one half of one percent (.50%) and (B) with respect to Eurodollar Rate Loans, the sum of the Eurodollar Rate plus two and one quarter of one percent (2.25%).  
Line of Credit Facility, Expiration Date     Jun. 30, 2020  
Long-term Line of Credit     $ 19,022,209  
Line of Credit Facility, Current Borrowing Capacity     $ 27,670,000  
Notes Payable        
Line of Credit Facility, Expiration Date     Jun. 30, 2020  
Fifth Amendment        
Line of Credit Facility, Expiration Date Jun. 30, 2020      
Revolving Credit Facility        
Maximum borrowing under PNC facility       36,000,000
Line of Credit Facility, Current Borrowing Capacity     $ 46,000,000  
Revolving Credit Facility | Fourth Amendment        
Interest rate description under PNC facility     Revolving Interest Rate shall mean an interest rate per annum equal to (a) the sum of the Alternate Base Rate (as defined in the PNC Facility) plus one half of one percent (.50%) with respect to Domestic Rate Loans and (b) the sum of the Eurodollar Rate plus two and one quarter of one percent (2.25%) with respect to the Eurodollar Rate Loans.  
Revolving Credit Facility | Base Rate        
Debt instrument, description of variable rate basis     Alternate Base Rate (as defined in the PNC Facility) plus one half of one percent  
Fixed charge coverage ratio percentage     0.50%  
Revolving Credit Facility | Base Rate | Fourth Amendment        
Debt instrument, description of variable rate basis     Base Rate (as defined in the PNC Facility) plus one half of one percent  
Revolving Credit Facility | Eurodollar | Fourth Amendment        
Debt instrument, description of variable rate basis     Eurodollar Rate plus two and one quarter of one percent  
Minimum        
Fixed charge coverage ratio   1.00 1.00  
Minimum | Fifth Amendment        
Maximum borrowing under PNC facility $ 40,000,000      
Minimum | Revolving Credit Facility | Fifth Amendment        
Maximum borrowing under PNC facility 36,000,000      
Maximum        
Fixed charge coverage ratio   1.10 1.10  
Maximum | Fifth Amendment        
Maximum borrowing under PNC facility 50,000,000      
Maximum | Revolving Credit Facility | Fifth Amendment        
Maximum borrowing under PNC facility $ 46,000,000      
Term Loan        
Maximum borrowing under PNC facility       $ 4,000,000
Term Loan | Fourth Amendment        
Interest rate description under PNC facility     Term Loan Rate shall mean an interest rate per annum equal to (a) the sum of the Alternate Base Rate plus one half of one percent (.50%) with respect to the Domestic Rate Loans and (b) the sum of the Eurodollar Rate plus two and one quarter of one percent (2.25%) with respect to Eurodollar Rate Loans.  
Term Loan | Base Rate | Fourth Amendment        
Debt instrument, description of variable rate basis     Base Rate plus one half of one percent  
Term Loan | Eurodollar | Fourth Amendment        
Debt instrument, description of variable rate basis     Eurodollar Rate plus two and one quarter of one percent  
Term Loan | Revolving Credit Facility | Base Rate        
Fixed charge coverage ratio percentage     0.50%  
Eurodollar Rates | Revolving Credit Facility        
Fixed charge coverage ratio percentage     2.25%  
Eurodollar Rates | Term Loan        
Fixed charge coverage ratio percentage     2.25%