Summary of Revenues Disaggregated by Timing of Goods and Services Transferred (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation Of Revenue [Line Items]
Net revenue	$ 8,116	$ 4,783
Revenue Recognized Over Time
Disaggregation Of Revenue [Line Items]
Net revenue	981	1,260
Revenue Recognized at a Point in Time
Disaggregation Of Revenue [Line Items]
Net revenue	$ 7,135	$ 3,523