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Segments and Major Customers (Details 3) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Major Customer Disclosure
Revenues	$ 72,812	$ 76,518	$ 145,726	$ 154,806
South Korea
Major Customer Disclosure
Revenues	26,821	26,946	53,642	53,799
USA
Major Customer Disclosure
Revenues	29,677	27,898	57,384	56,572
Japan
Major Customer Disclosure
Revenues	7,915	7,388	16,406	16,643
Europe
Major Customer Disclosure
Revenues	1,540	4,276	6,715	12,839
Canada
Major Customer Disclosure
Revenues	5	1,787	201	3,611
Asia-Other
Major Customer Disclosure
Revenues	$ 6,854	$ 8,223	$ 11,378	$ 11,342

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ 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=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher SEC



-Name Regulation S-X (SX)



-Number 210



-Section 03



-Paragraph 1



-Article 5

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