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Segment Reporting - Reportable Revenues by Geographic Regions (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]                      
Net revenues $ 10,859 $ 12,475 $ 10,735 $ 6,562 $ 6,648 $ 7,151 $ 7,129 $ 7,216 $ 40,631 $ 28,144 $ 27,306
North America [Member]                      
Segment Reporting Information [Line Items]                      
Net revenues                 33,215 28,144 27,306
Europe, Middle East and Africa [Member]                      
Segment Reporting Information [Line Items]                      
Net revenues                 6,992 0 0
Latin America [Member]                      
Segment Reporting Information [Line Items]                      
Net revenues                 $ 424 $ 0 $ 0