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SIGNIFICANT CUSTOMERS AND GEOGRAPHIC NET REVENUES Geograpic Net Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2020 | Mar. 31, 2019
Revenue by Geography |  |
Total net revenues | $ 109,664 | $ 89,188
United States of America |  |
Revenue by Geography |  |
Total net revenues | 2,713 | 2,672
Hong Kong/China |  |
Revenue by Geography |  |
Total net revenues | 60,413 | 47,229
Taiwan |  |
Revenue by Geography |  |
Total net revenues | 6,479 | 6,672
Korea |  |
Revenue by Geography |  |
Total net revenues | 10,357 | 8,542
Western Europe (excluding Germany) |  |
Revenue by Geography |  |
Total net revenues | 10,035 | 10,901
Japan |  |
Revenue by Geography |  |
Total net revenues | 3,905 | 3,650
Germany |  |
Revenue by Geography |  |
Total net revenues | 5,567 | 4,927
Other |  |
Revenue by Geography |  |
Total net revenues | $ 10,195 | $ 4,595

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