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Segments and Major Customers (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Major Customer Disclosure
Revenues	$ 56,458	$ 94,720	$ 102,884	$ 192,071
TAIWAN, PROVINCE OF CHINA
Major Customer Disclosure
Revenues	348	1,787	16,458	6,018
South Korea
Major Customer Disclosure
Revenues	1,666	28,291	10,267	57,260
USA
Major Customer Disclosure
Revenues	29,864	41,155	41,085	79,593
Japan
Major Customer Disclosure
Revenues	12,278	7,057	16,312	13,575
Europe
Major Customer Disclosure
Revenues	3,605	4,243	7,471	8,681
Canada
Major Customer Disclosure
Revenues	1,885	1,352	3,295	2,420
SINGAPORE
Major Customer Disclosure
Revenues	6,058	4,889	6,150	12,636
Asia-Other
Major Customer Disclosure
Revenues	$ 754	$ 5,946	$ 1,846	$ 11,888

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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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