Fair Value Measures (Schedule Of Assets And Liabilities Measured At Fair Value) (Details) - USD ($) $ in Thousands	Oct. 01, 2016	Jan. 02, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds included in cash equivalents	$ 44,541	$ 14,460
Foreign currency contracts included in prepaid expenses and other current assets	179	33
Total financial assets and liabilities	44,720	14,493
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds included in cash equivalents	44,541	14,460
Total financial assets and liabilities	44,541	14,460
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contracts included in prepaid expenses and other current assets	179	33
Total financial assets and liabilities	$ 179	$ 33