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Accumulated Other Comprehensive Loss | 3 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Income (Loss) The table below summarizes the changes in accumulated other comprehensive income (loss) by component for the periods indicated (in thousands):
|  | Three Months Ended
|  | March 31, 2018 |  | April 1, 2017
|  | Foreign Currency Translation Adjustments |  | Unrealized Gains and Losses on Available-for-Sale Marketable Securities |  | Foreign Currency Translation Adjustments |  | Total
Balance at beginning of period |  | $ | (169 | ) |  | $ | (6 | ) |  | $ | (650 | ) |  | $ | (656 | )
Other comprehensive income (loss) |  | 279 |  |  | (4 | ) |  | 61 |  |  | 57 |
Balance at end of period |  | $ | 110 |  |  | $ | (10 | ) |  | $ | (589 | ) |  | $ | (599 | )
Realized gains and losses on sales of available-for-sale marketable securities, if any, are reclassified from accumulated other comprehensive loss to “Other income (expense)” in the accompanying Condensed Consolidated Statements of Comprehensive Loss.

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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- References No definition available. + Details
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