Quarterly report pursuant to Section 13 or 15(d)

Summary of Revenues Disaggregated by Timing of Goods and Services Transferred (Detail)

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Summary of Revenues Disaggregated by Timing of Goods and Services Transferred (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Disaggregation Of Revenue [Line Items]    
Net revenue $ 4,783 $ 10,326
Revenue Recognized Over Time    
Disaggregation Of Revenue [Line Items]    
Net revenue 1,260 1,698
Revenue Recognized at a Point in Time    
Disaggregation Of Revenue [Line Items]    
Net revenue $ 3,523 $ 8,628