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Segment Information and Foreign Operations (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011
Segment Information [Abstract] |  |  |  |  |  |  |  |  |  |
Number of operating segments | 1 |  | 1 |  | 1 |  | 1 |  | 1 |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | $ 25,153 |  | $ 30,031 |  | $ 48,639 |  | $ 54,597 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 25,153 |  | 30,031 |  | 48,639 |  | 54,597 |  |  |
Long-lived assets by geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Long-lived assets | 35,316 |  |  |  | 35,316 |  |  |  | 34,282 | [1]
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |
Number of customers representing significant revenue | 1 |  | 1 |  | 1 |  | 1 |  |  |
Number of major customers | 5 |  | 5 |  | 5 |  | 5 |  |  |
Number of customers who accounted for 10% or more share in trade accounts receivable | 1 |  |  |  | 1 |  |  |  |  |
Major Customer One [Member] |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of revenue generated by major customers (in hundredths) | 15.10% |  | 19.00% |  | 16.20% |  | 17.60% |  |  |
Percentage of trade accounts receivable accounted by one customer (in hundredths) | 32.20% |  |  |  | 32.20% |  |  |  | 32.40% |
Top Five Major Customers [Member] |  |  |  |  |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of revenue generated by major customers (in hundredths) | 39.30% |  | 36.90% |  | 39.10% |  | 36.50% |  |  |
North America [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 4,266 | [2] | 6,412 | [2] | 9,433 | [2] | 10,204 | [2] |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 4,266 | [2] | 6,412 | [2] | 9,433 | [2] | 10,204 | [2] |  |
Long-lived assets by geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Long-lived assets | 375 |  |  |  | 375 |  |  |  | 484 |
Europe [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 4,806 |  | 6,048 |  | 9,371 |  | 11,232 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 4,806 |  | 6,048 |  | 9,371 |  | 11,232 |  |  |
Japan [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 2,603 |  | 4,379 |  | 4,792 |  | 7,407 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 2,603 |  | 4,379 |  | 4,792 |  | 7,407 |  |  |
Taiwan [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 3,594 |  | 2,745 |  | 5,640 |  | 5,609 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 3,594 |  | 2,745 |  | 5,640 |  | 5,609 |  |  |
Asia Pacific [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 9,884 |  | 10,447 |  | 19,403 |  | 20,145 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 9,884 |  | 10,447 |  | 19,403 |  | 20,145 |  |  |
China [Member] |  |  |  |  |  |  |  |  |  |
Long-lived assets by geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Long-lived assets | 34,941 |  |  |  | 34,941 |  |  |  | 33,798 |
GaAs Substrates [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 14,862 |  | 17,966 |  | 27,093 |  | 33,858 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 14,862 |  | 17,966 |  | 27,093 |  | 33,858 |  |  |
InP Substrates [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 1,333 |  | 1,604 |  | 2,784 |  | 2,936 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 1,333 |  | 1,604 |  | 2,784 |  | 2,936 |  |  |
Ge Substrates [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 2,441 |  | 2,701 |  | 5,071 |  | 5,691 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | 2,441 |  | 2,701 |  | 5,071 |  | 5,691 |  |  |
Raw Materials And Other [Member] |  |  |  |  |  |  |  |  |  |
Revenue by product type |  |  |  |  |  |  |  |  |  |
Net revenue | 6,517 |  | 7,760 |  | 13,691 |  | 12,112 |  |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |  |  |  |  |  |  |
Net revenue | $ 6,517 |  | $ 7,760 |  | $ 13,691 |  | $ 12,112 |  |  |
[1] | The Condensed Consolidated Balance Sheet at December 31, 2011 has been derived from the audited consolidated financial statements at that date.
[2] | Primarily the United States

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