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Segment, Customer Concentration and Geographical Information - Company Revenue in Different Geographic Locations (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | $ 6,478 | $ 9,586 | $ 21,151 | $ 29,501
Americas [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 6,218 | 9,514 | 20,662 | 29,079
EMEA [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | 203 | 46 | 367 | 171
Asia Pacific [Member] |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Total revenues | $ 57 | $ 26 | $ 122 | $ 251

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + 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=63488584&loc=d3e20235-122688 + Details
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