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 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation Of Revenue [Line Items]        
Net revenue $ 2,938 $ 8,645 $ 7,721 $ 18,971
United States        
Disaggregation Of Revenue [Line Items]        
Net revenue 2,195 5,898 5,324 12,014
International        
Disaggregation Of Revenue [Line Items]        
Net revenue $ 743 $ 2,747 $ 2,397 $ 6,957