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 |