Quarterly report pursuant to Section 13 or 15(d)

Summary of Disaggregation of Revenues Related to Geographic Areas (Detail)

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Summary of Disaggregation of Revenues Related to Geographic Areas (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation Of Revenue [Line Items]    
Net revenue $ 4,783 $ 10,326
United States    
Disaggregation Of Revenue [Line Items]    
Net revenue 3,129 6,116
International    
Disaggregation Of Revenue [Line Items]    
Net revenue $ 1,654 $ 4,210