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Revenues Based on Customer Location (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Total revenues	$ 10,005	$ 12,006	$ 34,934	$ 40,710
United States
Segment Reporting Information [Line Items]
Total revenues	1,482	2,454	4,706	8,631
Europe and Middle East
Segment Reporting Information [Line Items]
Total revenues	3,297	3,345	10,722	10,435
Asia Pacific
Segment Reporting Information [Line Items]
Total revenues	5,226	6,207	19,506	21,644
Germany
Segment Reporting Information [Line Items]
Total revenues		1,627	4,424	5,026
China
Segment Reporting Information [Line Items]
Total revenues	4,385	4,380	15,214	13,674
Japan
Segment Reporting Information [Line Items]
Total revenues				$ 4,323

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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