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Information Regarding Net Revenue by Geographic Region (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Segment Reporting Information [Line Items]    
Net revenue $ 18,120 $ 19,522
Geographic Concentration Risk | Revenue from Contract with Customer    
Segment Reporting Information [Line Items]    
Percentage of net revenue 100.00% 100.00%
Americas    
Segment Reporting Information [Line Items]    
Net revenue $ 13,868 $ 14,725
Americas | Geographic Concentration Risk | Revenue from Contract with Customer    
Segment Reporting Information [Line Items]    
Percentage of net revenue 77.00% 75.00%
Europe and the Middle East    
Segment Reporting Information [Line Items]    
Net revenue $ 2,601 $ 2,930
Europe and the Middle East | Geographic Concentration Risk | Revenue from Contract with Customer    
Segment Reporting Information [Line Items]    
Percentage of net revenue 14.00% 15.00%
Asia-Pacific    
Segment Reporting Information [Line Items]    
Net revenue $ 1,651 $ 1,867
Asia-Pacific | Geographic Concentration Risk | Revenue from Contract with Customer    
Segment Reporting Information [Line Items]    
Percentage of net revenue 9.00% 10.00%