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v3.19.3.a.u2

Segments and Major Customers (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 59,947 | $ 57,399 | $ 58,297 | $ 48,384 | $ 68,563 | $ 59,754 | $ 56,458 | $ 46,426 | $ 224,027 | $ 231,201 | $ 393,096
Property, plant and equipment, net | 44,714 |  |  |  | 57,028 |  |  |  | 44,714 | 57,028 |
South Korea |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 3,583 | 13,421 | 115,811
USA |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 134,526 | 129,567 | 165,263
Property, plant and equipment, net | 40,300 |  |  |  | 50,400 |  |  |  | 40,300 | 50,400 |
TAIWAN, PROVINCE OF CHINA |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 24,118 | 21,749 | 9,953
Japan |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 11,877 | 23,222 | 23,378
Europe |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 10,262 | 15,668 | 22,597
Canada |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 3,554 | 4,960 | 4,373
SINGAPORE |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 21,751 | 19,140 | 22,554
Asia-Other |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 14,356 | 3,474 | $ 29,167
India |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | 3,400 |  |  |  | 3,800 |  |  |  | 3,400 | 3,800 |
Other foreign locations |  |  |  |  |  |  |  |  |  |  |
Major Customer Disclosure |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, net | $ 1,000 |  |  |  | $ 2,800 |  |  |  | $ 1,000 | $ 2,800 |

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