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Segments and Major Customers (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Major Customer Disclosure |  |  |  |
Revenues | $ 73,779 | $ 69,712 | $ 219,505 | $ 224,518
South Korea |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 30,821 | 26,821 | 84,463 | 80,620
USA |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 33,146 | 24,950 | 90,530 | 81,522
Japan |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 3,460 | 6,497 | 19,866 | 23,140
Europe |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 1,571 | 4,238 | 8,287 | 17,077
Canada |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 6 | 1,754 | 207 | 5,365
SINGAPORE |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 3,222 | 3,910 | 11,042 | 10,170
Asia-Other |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | $ 1,553 | $ 1,542 | $ 5,110 | $ 6,624

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