Summary of Revenues Disaggregated by Timing of Goods and Services Transferred (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation Of Revenue [Line Items]
Net revenue	$ 9,531	$ 6,539	$ 26,780	$ 14,260
Revenue Recognized Over Time
Disaggregation Of Revenue [Line Items]
Net revenue	1,116	898	3,269	3,143
Revenue Recognized at a Point in Time
Disaggregation Of Revenue [Line Items]
Net revenue	$ 8,415	$ 5,641	$ 23,511	$ 11,117