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OTHER LONG-TERM LIABILITIES (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Dec. 31, 2018
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Other Long-term Liabilities [Abstract] |  |
Other long-term liabilities | $ 2,980 | $ 4,583
Subsidies to Stress Free Polishing Project, Commenced in 2008 and 2017 [Member] |  |
Other Long-term Liabilities [Abstract] |  |
Other long-term liabilities | 1,281 | 1,483
Subsidies to Electro Copper Plating Project, Commenced in 2014 |  |
Other Long-term Liabilities [Abstract] |  |
Other long-term liabilities | 1,456 | 2,860
Subsidies to Polytetrafluoroethylene, Commenced in 2018 [Member] |  |
Other Long-term Liabilities [Abstract] |  |
Other long-term liabilities | 143 | 178
Other [Member] |  |
Other Long-term Liabilities [Abstract] |  |
Other long-term liabilities | $ 100 | $ 62

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- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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