Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Financial Assets Valued on Recurring Basis for Cash and Cash Equivalents and Investments (Detail)

v2.4.0.8
Fair Value Measurements - Financial Assets Valued on Recurring Basis for Cash and Cash Equivalents and Investments (Detail) (Fair Value, Measurements, Recurring [Member], USD $)
In Thousands, unless otherwise specified
Jun. 28, 2014
Dec. 28, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value $ 2,461 $ 865
Level 1 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 2,461 865
Level 2 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value      
Level 3 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value      
Valuation Techniques [Member] | Cash and cash equivalents [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 1,675 818
Valuation Techniques [Member] | Investments - mutual funds [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 786 47
Valuation Techniques [Member] | Level 1 [Member] | Cash and cash equivalents [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 1,675 818
Valuation Techniques [Member] | Level 1 [Member] | Investments - mutual funds [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value 786 47
Valuation Techniques [Member] | Level 2 [Member] | Cash and cash equivalents [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value      
Valuation Techniques [Member] | Level 2 [Member] | Investments - mutual funds [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value      
Valuation Techniques [Member] | Level 3 [Member] | Cash and cash equivalents [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value      
Valuation Techniques [Member] | Level 3 [Member] | Investments - mutual funds [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Assets, fair value