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Segments and Major Customers (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Major Customer Disclosure |  |  |  |
Revenues | $ 89,855 | $ 73,779 | $ 239,038 | $ 219,505
South Korea |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 32,519 | 30,821 | 95,604 | 84,463
USA |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 32,951 | 33,146 | 84,835 | 90,530
Japan |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 9,551 | 3,460 | 20,449 | 19,866
Europe |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 4,271 | 1,571 | 12,362 | 8,287
Canada |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 1,162 | 6 | 2,544 | 207
SINGAPORE |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 4,429 | 3,222 | 13,574 | 11,042
Asia-Other |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | $ 4,972 | $ 1,553 | $ 9,670 | $ 5,110

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