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Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Other Long Term Liabilities [Line Items]
Other long-term liabilities	$ 6,181	$ 6,217
Subsidies to Stress Free Polishing project [Member]
Other Long Term Liabilities [Line Items]
Other long-term liabilities	1,977	1,952
Subsidies to Electro Copper Plating project [Member]
Other Long Term Liabilities [Line Items]
Other long-term liabilities	$ 4,204	$ 4,265

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- Definition

Other Long Term Liabilities [Line Items]

+ References

No definition available.

+ Details

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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://www.xbrl.org/2003/role/presentationRef
-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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- Details

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X

- Details

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