Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Debt - Additional Information (Detail)

v3.10.0.1
Debt - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 22, 2016
Dec. 31, 2018
Jun. 21, 2018
Dec. 31, 2017
Line of Credit Facility [Line Items]        
Noncurrent line of credit   $ 5,000,000   $ 24,516,000
Weighted average interest rate of debt   4.56%    
Capital Lease Obligations        
Line of Credit Facility [Line Items]        
Weighted average interest rate of debt   4.56%    
Term Loan        
Line of Credit Facility [Line Items]        
Debt instrument, face amount $ 75,000,000.0   $ 30,000,000.0  
Current line of credit   $ 7,900,000    
Noncurrent line of credit   88,900,000    
Unamortized debt issuance expense   $ 1,000,000.0    
Debt instrument, percentage of net cash proceeds from sales and dispositions subject to certain reinvestment rights 100.00%      
Debt instrument percentage of net cash proceeds from issuances or incurrence of additional debt to be used for mandatory prepayment 100.00%      
Debt instrument percentage of excess cash flow to be used for mandatory prepayment starting next fiscal year 75.00%      
Debt instrument covenant leverage ratio 325.00%      
Debt instrument percentage of net cash proceeds from issuances of permitted equity securities to be used for mandatory prepayment 100.00%      
Term Loan | Minimum        
Line of Credit Facility [Line Items]        
Debt instrument covenant leverage ratio   275.00%    
Term Loan | Federal Funds Rate        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 0.50%      
Term Loan | London Interbank Offered Rate (LIBOR)        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 1.00%      
Term Loan | London Interbank Offered Rate (LIBOR) | Minimum        
Line of Credit Facility [Line Items]        
Debt instrument applicable margin rate 2.25%      
Term Loan | London Interbank Offered Rate (LIBOR) | Maximum        
Line of Credit Facility [Line Items]        
Debt instrument applicable margin rate 4.00%      
Term Loan | Base Rate | Minimum        
Line of Credit Facility [Line Items]        
Debt instrument applicable margin rate 1.25%      
Term Loan | Base Rate | Maximum        
Line of Credit Facility [Line Items]        
Debt instrument applicable margin rate 3.00%      
Revolving Facility        
Line of Credit Facility [Line Items]        
Debt instrument, percentage of net cash proceeds from sales and dispositions subject to certain reinvestment rights 100.00%      
Debt instrument percentage of net cash proceeds from issuances or incurrence of additional debt to be used for mandatory prepayment 100.00%      
Debt instrument percentage of excess cash flow to be used for mandatory prepayment starting next fiscal year 75.00%      
Debt instrument covenant leverage ratio 275.00% 325.00%    
Debt instrument percentage of net cash proceeds from issuances of permitted equity securities to be used for mandatory prepayment 100.00%      
Maximum borrowing capacity $ 75,000,000      
Total outstanding borrowings   $ 5,000,000.0    
Debt instrument, percentage of excess cash flow to be used for mandatory prepayment, step-down percentage   50.00%    
Unamortized discount (premium) and debt issuance costs   $ 800,000    
Swingline sublimit $ 10,000,000      
Debt instrument excess cash flow payable   $ 0    
Revolving Facility | Maximum        
Line of Credit Facility [Line Items]        
Debt instrument, covenant, leverage ratio required for step-down percentage   3.25    
Revolving Facility | Federal Funds Rate        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 0.50%      
Revolving Facility | London Interbank Offered Rate (LIBOR)        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 1.00%      
Revolving Facility | London Interbank Offered Rate (LIBOR) | Minimum        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 2.25%      
Revolving Facility | London Interbank Offered Rate (LIBOR) | Maximum        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 4.00%      
Revolving Facility | Base Rate | Minimum        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 1.25%      
Revolving Facility | Base Rate | Maximum        
Line of Credit Facility [Line Items]        
Debt instrument, basis spread on variable rate 3.00%