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Segment Information and Foreign Operations, Revenue by product (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Revenue by product type [Abstract] |  |  |  |
Net revenue | $ 21,449 | $ 23,831 | $ 40,794 | $ 46,211
GaAs Substrates [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 11,364 | 10,642 | 19,852 | 22,365
InP Substrates [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 3,000 | 2,017 | 5,180 | 3,866
Ge Substrates [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 1,681 | 5,347 | 4,959 | 7,898
Raw Materials And Other [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | $ 5,404 | $ 5,825 | $ 10,803 | $ 12,082

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + 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 + Details
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