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Senior Credit Facility - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
0 Months Ended 12 Months Ended
Aug. 19, 2011
Feb. 01, 2014
Revolving Credit Facility Before Amendment [Member]
   
Line of Credit Facility [Line Items]    
Line of credit facility maximum borrowing capacity $ 45  
Revolving Credit Facility [Member]
   
Line of Credit Facility [Line Items]    
Line of credit facility maximum borrowing capacity 50  
Extension of Company's senior secured revolving credit facility   2016-08
Interest rate on borrowings   Borrowings under the facility bear interest at an annual rate equal to LIBOR plus a margin ranging from 175 to 225 basis points with no LIBOR floor. Additionally, a fee of 0.375% per annum is assessed on the unused portion of the facility
Percentage of fee on unused portion of the facility 0.375%  
Outstanding borrowings under the credit facility   0
Available borrowing capacity of line of credit facility   $ 32.5
Revolving Credit Facility [Member] | Minimum [Member]
   
Line of Credit Facility [Line Items]    
Interest at an annual rate equal to LIBOR plus a margin range 1.75%  
Revolving Credit Facility [Member] | Maximum [Member]
   
Line of Credit Facility [Line Items]    
Interest at an annual rate equal to LIBOR plus a margin range 2.25%