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Segment Information and Concentrations of Risk - Additional Information (Detail) | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended
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Sep. 30, 2014 Segments | Sep. 30, 2013 Net Revenues [Member] Customer Concentration [Member] | Sep. 30, 2014 Net Revenues [Member] Customer Concentration [Member] | Sep. 30, 2013 Net Revenues [Member] Customer Concentration [Member] | Sep. 30, 2014 Net Revenues [Member] Customer Concentration [Member] Customer One [Member] | Sep. 30, 2014 Net Revenues [Member] Customer Concentration [Member] Customer Two [Member]
Segment Reporting Information [Line Items] |  |  |  |  |  |
Number of business segments | 2 |  |  |  |  |
Net revenues, percentage |  | 59.00% | 44.00% | 61.00% | 54.00% | 12.00%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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