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Segments and Major Customers (Details 3) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Major Customer Disclosure
Revenues	$ 46,426	$ 97,351
TAIWAN, PROVINCE OF CHINA
Major Customer Disclosure
Revenues	16,110	4,232
South Korea
Major Customer Disclosure
Revenues	8,601	28,969
USA
Major Customer Disclosure
Revenues	11,221	38,438
Japan
Major Customer Disclosure
Revenues	4,034	6,518
Europe
Major Customer Disclosure
Revenues	3,866	4,438
Canada
Major Customer Disclosure
Revenues	1,410	1,068
SINGAPORE
Major Customer Disclosure
Revenues	92	7,747
Asia-Other
Major Customer Disclosure
Revenues	$ 1,092	$ 5,941

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+ References

No definition available.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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