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Segment Information (Schedule of Net Revenue by Geographic Areas) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 29, 2019 | Sep. 30, 2018 | Sep. 29, 2019 | Sep. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 106,116 | $ 131,174 | $ 247,594 | $ 342,760
United States (“U.S.”) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 81,441 | 108,236 | 184,733 | 263,798
Americas (excluding U.S.) |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 4,121 | 4,613 | 9,759 | 10,455
EMEA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 13,002 | 11,760 | 37,370 | 50,416
Asia Pacific |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 7,552 | $ 6,565 | $ 15,732 | $ 18,091

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