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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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenue by product type [Abstract]
Net revenue	$ 23,831	$ 25,153	$ 46,211	$ 48,639
GaAs Substrates [Member]
Revenue by product type [Abstract]
Net revenue	10,642	14,862	22,365	27,093
InP Substrates [Member]
Revenue by product type [Abstract]
Net revenue	2,017	1,333	3,866	2,784
Ge Substrates [Member]
Revenue by product type [Abstract]
Net revenue	5,347	2,441	7,898	5,071
Raw Materials And Other [Member]
Revenue by product type [Abstract]
Net revenue	$ 5,825	$ 6,517	$ 12,082	$ 13,691

X

- 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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X

- Details

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