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Segment Information (Details 3) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Major Customer Disclosure |  |  |  |
Revenue | $ 59,930 | $ 58,297 | $ 123,919 | $ 106,681
USA |  |  |  |
Major Customer Disclosure |  |  |  |
Revenue | 32,014 | 29,964 | 66,802 | 64,203
Taiwan |  |  |  |
Major Customer Disclosure |  |  |  |
Revenue | 3,752 | 12,760 | 10,816 | 14,861
South Korea |  |  |  |
Major Customer Disclosure |  |  |  |
Revenue | 701 | 758 | 2,521 | 2,039
Japan |  |  |  |
Major Customer Disclosure |  |  |  |
Revenue | 6,156 | 2,527 | 8,999 | 5,146
Europe |  |  |  |
Major Customer Disclosure |  |  |  |
Revenue | 4,944 | 2,640 | 5,682 | 6,015
Canada |  |  |  |
Major Customer Disclosure |  |  |  |
Revenue | 31 | 1,423 | 543 | 2,481
Singapore |  |  |  |
Major Customer Disclosure |  |  |  |
Revenue | 8,802 | 4,725 | 16,432 | 6,609
Asia-Other |  |  |  |
Major Customer Disclosure |  |  |  |
Revenue | $ 3,530 | $ 3,500 | $ 12,124 | $ 5,327

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- Definition Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 + Details
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