Quarterly report pursuant to Section 13 or 15(d)

Investments - Investments, Recorded at Fair Value (Detail)

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Investments - Investments, Recorded at Fair Value (Detail) (Mutual funds, USD $)
In Thousands, unless otherwise specified
Sep. 27, 2014
Dec. 28, 2013
Mutual funds
    
Schedule of Available-for-Sale Securities [Line Items]    
Investments, amortized cost $ 39 [1] $ 40 [1]
Investments, unrealized gains 0 [1] 7 [1]
Investments, unrealized losses 0 [1] 0 [1]
Investments, fair value $ 39 [1] $ 47 [1]
[1] Mutual funds, consisting of government bonds, stocks and short-term money market funds, are classified as short-term investments available-for-sale and recorded at fair market value, based on quoted prices of identical assets that are trading in active markets as of the end of the period for which the values are determined.