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Segment Information and Foreign Operations (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2013 Segment | Mar. 31, 2012 | Dec. 31, 2012
Segment Information [Abstract] |  |  |  |
Number of operating segments | 1 |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | $ 22,380 | $ 23,486 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 22,380 | 23,486 |  |
Long-lived assets by geographic region [Abstract] |  |  |  |
Long-lived assets | 37,477 |  | 37,235 | [1]
Major Customer One [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Number of customers representing significant revenue | 0 | 1 |  |
Percentage of revenue generated by major customers (in hundredths) |  | 17.00% |  |
Number of customers who accounted for 10% or more share in trade accounts receivable | 1 |  | 1 |
Percentage of trade accounts receivable accounted by one customer (in hundredths) | 18.00% |  | 28.00% |
Top Five Major Customers [Member] |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |
Percentage of revenue generated by major customers (in hundredths) | 34.00% | 46.00% |  |
Number of major customers | 5 | 5 |  |
China [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 6,029 | 5,774 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 6,029 | 5,774 |  |
Long-lived assets by geographic region [Abstract] |  |  |  |
Long-lived assets | 37,140 |  | 36,805 |
Europe (primarily Germany) [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 4,689 | 4,565 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 4,689 | 4,565 |  |
Taiwan [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 3,779 | 2,046 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 3,779 | 2,046 |  |
North America (primarily the United States) [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 3,469 | 5,167 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 3,469 | 5,167 |  |
Long-lived assets by geographic region [Abstract] |  |  |  |
Long-lived assets | 337 |  | 430 |
Japan [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 2,282 | 2,189 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 2,282 | 2,189 |  |
Asia Pacific (excluding Japan and Taiwan) [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 2,132 | 3,745 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 2,132 | 3,745 |  |
GaAs Substrates [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 11,723 | 12,231 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 11,723 | 12,231 |  |
InP Substrates [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 1,849 | 1,451 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 1,849 | 1,451 |  |
Ge Substrates [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 2,551 | 2,630 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | 2,551 | 2,630 |  |
Raw Materials And Other [Member] |  |  |  |
Revenue by product type [Abstract] |  |  |  |
Net revenue | 6,257 | 7,174 |  |
Net revenues reported for products shipped to customers in corresponding geographic region [Abstract] |  |  |  |
Net revenue | $ 6,257 | $ 7,174 |  |
[1] | The condensed consolidated balance sheet at December 31, 2012 has been derived from the audited consolidated financial statements at that date.

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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