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Segment information - Schedule of Revenue by Geography Based on Customer Location (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Revenue: |  |  |
Revenue |  | $ 50,766 | $ 39,424
United States [Member] |  |  |
Revenue: |  |  |
Revenue |  | 46,694 | 35,405
Outside of the United States [Member] |  |  |
Revenue: |  |  |
Revenue | [1] | $ 4,072 | $ 4,019
[1] | No individual country, other than disclosed above, exceeded 10% of total consolidated revenue for any period presented.

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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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- Details
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- Details
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Period Type: |