Quarterly report pursuant to Section 13 or 15(d)

Debt - Additional Information (Detail)

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Debt - Additional Information (Detail)
 3 Months Ended 9 Months Ended
Dec. 05, 2016
USD ($)
Mar. 31, 2017
Sep. 30, 2017
USD ($)
Jun. 28, 2017
USD ($)
Jun. 27, 2017
USD ($)
Mar. 22, 2017
Dec. 31, 2016
USD ($)
Mar. 23, 2015
USD ($)
Line of Credit Facility [Line Items]                
Actual leverage ratio   2.96            
Actual interest rate     3.99%          
LIBOR [Member]                
Line of Credit Facility [Line Items]                
Actual interest rate     1.24%          
Libor Plus [Member]                
Line of Credit Facility [Line Items]                
Actual interest rate     2.75%          
First Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Amendment to Credit Agreement, description     Amending the leverage ratio covenant to provide for the following schedule of maximum permitted ratios: (a) 2.75 to 1.0 at any time on or after December 31, 2015 but prior to March 31, 2017, (b) 2.50 to 1.0 at any time on or after March 31, 2017 but prior to March 31, 2018 or (c) 2.25 to 1.00 at any time on or after March 31, 2018.          
Second Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Amendment to Credit Agreement, description     Amending the leverage ratio covenant to provide for the following schedule of maximum permitted ratios: (a) 2.75 to 1.0 at any time on or after December 31, 2015 but prior to March 31, 2018, (b) 2.50 to 1.0 at any time on or after March 31, 2018 but prior to March 31, 2019 or (c) 2.25 to 1.00 at any time on or after March 31, 2019.          
Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Current borrowings under credit facility     $ 30,665,999.98          
Debt instrument period payment, principal amount     577,500          
Aggregate amount of term loan       $ 2,500,000 $ 5,000,000      
Periodic payment of debt     $ 766,650          
Increase in basis points of interest rate under credit agreement     0.50%          
Third Amended Credit Agreement [Member] | Leverage Ratio Greater than or Equal to 2.5 to 1.0 [Member]                
Line of Credit Facility [Line Items]                
Percentage of excess cashflow to prepay debt     75.00%          
Third Amended Credit Agreement [Member] | Leverage Ratio Less than 2.5 to 1.0 but Greater than or Equal to 2.0 to 1.0 [Member]                
Line of Credit Facility [Line Items]                
Percentage of excess cashflow to prepay debt     50.00%          
Third Amended Credit Agreement [Member] | Leverage Ratio Less than 2.0 to 1.0 [Member]                
Line of Credit Facility [Line Items]                
Percentage of excess cashflow to prepay debt     0.00%          
CBFR Loan [Member] | LIBOR [Member]                
Line of Credit Facility [Line Items]                
Number of LIBOR days     30 days          
Variable interest rate     2.50%          
JP Morgan Chase Bank [Member]                
Line of Credit Facility [Line Items]                
Credit facility, maturity date     Mar. 23, 2020          
Term Loan A [Member]                
Line of Credit Facility [Line Items]                
Current borrowings under credit facility               $ 27,000,000
Term Loan A [Member] | JP Morgan Chase Bank [Member]                
Line of Credit Facility [Line Items]                
Line of credit facility               27,000,000
Term Loan B [Member]                
Line of Credit Facility [Line Items]                
Current borrowings under credit facility               8,000,000
Term Loan B [Member] | JP Morgan Chase Bank [Member]                
Line of Credit Facility [Line Items]                
Line of credit facility               8,000,000
Revolving Credit Facility [Member]                
Line of Credit Facility [Line Items]                
Current borrowings under credit facility     $ 0       $ 0  
Revolving Credit Facility [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Aggregate amount of term loan       12,500,000 25,000,000      
Revolving Credit Facility [Member] | JP Morgan Chase Bank [Member]                
Line of Credit Facility [Line Items]                
Line of credit facility               $ 10,000,000
Revolving Credit Facility [Member] | JP Morgan Chase Bank [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Aggregate amount of term loan       $ 5,000,000 $ 10,000,000      
Term Loan [Member]                
Line of Credit Facility [Line Items]                
Frequency of period payment     Setting the quarterly mandatory principal payment due on the Term Loan to $1.3 million due on the last business day of each fiscal quarter with any remaining unpaid and outstanding amount due at maturity          
Term Loan [Member] | First Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Current borrowings under credit facility $ 32,000,000              
Additional available balance 5,000,000              
Debt instrument period payment, principal amount 1,300,000              
Term Loan [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Aggregate amount of term loan $ 32,000,000              
Maximum [Member] | First Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
After amendment, maximum leverage covenant ratio at any time on or after December 31, 2015 but prior to March 31, 2017 2.75%              
After amendment, maximum leverage covenant ratio at any time on or after March 31, 2017 but prior to March 31, 2018 2.50%              
After amendment, maximum leverage covenant ratio at any time on or after March 31, 2018 2.25%              
Maximum [Member] | Second Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
After amendment, maximum leverage covenant ratio at any time on or after December 31, 2015 but prior to March 31, 2018           2.75%    
After amendment, maximum leverage covenant ratio at any time on or after March 31, 2018 but prior to March 31, 2019           2.50%    
After amendment, maximum leverage covenant ratio at any time on or after March 31, 2019           2.25%    
Maximum [Member] | Third Amended Credit Agreement [Member] | Leverage Ratio Greater than or Equal to 2.5 to 1.0 [Member]                
Line of Credit Facility [Line Items]                
Actual leverage ratio     2.5          
Maximum [Member] | Third Amended Credit Agreement [Member] | Leverage Ratio Less than 2.0 to 1.0 [Member]                
Line of Credit Facility [Line Items]                
Actual leverage ratio     2.0          
Maximum [Member] | Eurodollar Loan [Member] | LIBOR [Member]                
Line of Credit Facility [Line Items]                
Variable interest applicable margin rate     3.00%          
Maximum [Member] | CBFR Loan [Member] | LIBOR [Member]                
Line of Credit Facility [Line Items]                
Variable interest applicable margin rate     0.25%          
Maximum [Member] | Leverage Ratio Less than 4.0 to 1.0 at any Time on or After the Effective Date but Prior to December 31, 2017 [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Actual leverage ratio     4.0          
Maximum [Member] | Leverage Ratio Less than 3.75 to 1.0 at any Time on or After December 31, 2017 but Prior to June 30, 2018 [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Actual leverage ratio     3.75          
Maximum [Member] | Leverage Ratio Less than 3.50 to 1.0 at any Time on or After June 30, 2018 but Prior to December 31, 2018 [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Actual leverage ratio     3.50          
Maximum [Member] | Leverage Ratio Less than 3.00 to 1.00 at any Time on or After December 31, 2018 [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Actual leverage ratio     3.00          
Minimum [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Actual leverage ratio     2.5          
Minimum [Member] | Third Amended Credit Agreement [Member] | Leverage Ratio Less than 2.5 to 1.0 but Greater than or Equal to 2.0 to 1.0 [Member]                
Line of Credit Facility [Line Items]                
Actual leverage ratio     2.0          
Minimum [Member] | Eurodollar Loan [Member] | LIBOR [Member]                
Line of Credit Facility [Line Items]                
Variable interest applicable margin rate     2.00%          
Minimum [Member] | CBFR Loan [Member] | LIBOR [Member]                
Line of Credit Facility [Line Items]                
Variable interest applicable margin rate     (1.00%)          
Minimum [Member] | Leverage Ratio Greater than 1.15:1.0 at any Time on or After the Effective Date but Prior to March 31, 2018 [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Fixed Charge Coverage Ratio     1.15          
Minimum [Member] | Leverage Ratio Greater than 1.25:1.0 at any Time on or After March 31, 2018 [Member] | Third Amended Credit Agreement [Member]                
Line of Credit Facility [Line Items]                
Fixed Charge Coverage Ratio     1.25