Quarterly report pursuant to Section 13 or 15(d)

Investments - Investments, Recorded at Fair Value (Detail)

v2.4.1.9
Investments - Investments, Recorded at Fair Value (Detail) (USD $)
In Thousands, unless otherwise specified
Apr. 04, 2015
Jan. 03, 2015
Available-for-sale Securities, Amortized Cost Basis [Abstract]    
Amortized Cost $ 66us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis [1] $ 62us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis [1]
Unrealized Gains 0prts_AvailableforsaleEquitySecuritiesAccumulatedGrossUnrealizedGainbeforeTax [1] 0prts_AvailableforsaleEquitySecuritiesAccumulatedGrossUnrealizedGainbeforeTax [1]
Unrealized Losses 0prts_AvailableforsaleEquitySecuritiesAccumulatedGrossUnrealizedLossbeforeTax [1] 0prts_AvailableforsaleEquitySecuritiesAccumulatedGrossUnrealizedLossbeforeTax [1]
Fair Value $ 66us-gaap_AvailableForSaleSecuritiesEquitySecurities [1] $ 62us-gaap_AvailableForSaleSecuritiesEquitySecurities [1]
[1] Mutual 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.