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Segments and Major Customers (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Major Customer Disclosure |  |  |  |
Revenues | $ 99,134 | $ 89,855 | $ 291,205 | $ 239,038
South Korea |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 29,476 | 32,519 | 86,736 | 95,604
USA |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 43,532 | 32,951 | 123,115 | 84,835
Japan |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 4,933 | 9,551 | 18,508 | 20,449
Europe |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 9,160 | 4,271 | 17,850 | 12,362
Canada |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 933 | 1,162 | 3,353 | 2,544
SINGAPORE |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 4,927 | 4,429 | 17,563 | 13,574
Asia-Other |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | $ 6,173 | $ 4,972 | $ 24,080 | $ 9,670

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