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Segments and Major Customers (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2017 | Jun. 30, 2016
Major Customer Disclosure |  |  |  |
Revenues | $ 94,720 | $ 76,501 | $ 192,071 | $ 149,183
South Korea |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 28,291 | 31,632 | 57,260 | 63,086
USA |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 41,155 | 26,532 | 79,593 | 51,776
Japan |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 7,057 | 5,911 | 13,575 | 10,898
Europe |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 4,243 | 4,377 | 8,681 | 8,189
Canada |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 1,352 | 1,168 | 2,420 | 1,382
SINGAPORE |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | 4,889 | 4,526 | 12,636 | 9,145
Asia-Other |  |  |  |
Major Customer Disclosure |  |  |  |
Revenues | $ 7,733 | $ 2,355 | $ 17,906 | $ 4,707

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