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Cash, Cash Equivalents and Investments (Details 4)
$ in Thousands
Jan. 02, 2016
USD ($)
Contractual maturity of marketable debt investments  
Marketable debt securities, amortized cost, due in less than one year $ 50,777
Marketable debt securities, amortized cost, due in one to three years 41,693
Marketable debt securities, amortized cost, total 92,470
Marketable debt securities, fair value, due in less than one year 50,751
Marketable debt securities, fair value, due in one to three years 41,555
Marketable debt securities, fair value, total $ 92,306