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Senior Credit Facility - Additional Information (Detail) - USD ($)
 6 Months Ended
Feb. 26, 2016
Jul. 30, 2016
Revolving Credit Facility Before Amendment [Member]    
Line of Credit Facility [Line Items]    
Swingline availability $ 5,000,000  
Revolving Credit Facility [Member]    
Line of Credit Facility [Line Items]    
Swingline availability 10,000,000  
Incremental accordion feature 25,000,000  
Secured Credit Facility [Member] | Revolving Credit Facility Before Amendment [Member]    
Line of Credit Facility [Line Items]    
Line of credit facility maximum borrowing capacity 50,000,000  
Secured Credit Facility [Member] | Revolving Credit Facility [Member]    
Line of Credit Facility [Line Items]    
Line of credit facility maximum borrowing capacity $ 75,000,000  
Percentage of fee on unused portion of the facility 0.25%  
Interest rate on borrowings   Borrowings under the facility bear interest at an annual rate equal to LIBOR plus a margin ranging from 125 to 175 basis points with no LIBOR floor. Additionally, a fee of 0.25% per annum is assessed on the unused portion of the facility.
Extension of Company's senior secured revolving credit facility   2021-02
Outstanding borrowings under the credit facility   $ 0
Available borrowing capacity of line of credit facility   $ 51,900,000
Secured Credit Facility [Member] | Revolving Credit Facility [Member] | Minimum [Member]    
Line of Credit Facility [Line Items]    
Interest at an annual rate equal to LIBOR plus a margin range 1.25%  
Secured Credit Facility [Member] | Revolving Credit Facility [Member] | Maximum [Member]    
Line of Credit Facility [Line Items]    
Interest at an annual rate equal to LIBOR plus a margin range 1.75%