Total Net Revenue Based on Disaggregation Criteria (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Total net revenue	$ 23,993	$ 19,105	$ 46,155	$ 37,225
Point-in-Time
Disaggregation Of Revenue [Line Items]
Total net revenue	23,072	18,065	44,386	34,865
Over Time
Disaggregation Of Revenue [Line Items]
Total net revenue	921	1,040	1,769	2,360
Americas
Disaggregation Of Revenue [Line Items]
Total net revenue	14,208	13,670	29,356	27,538
Americas | Point-in-Time
Disaggregation Of Revenue [Line Items]
Total net revenue	13,382	12,725	27,778	25,370
Americas | Over Time
Disaggregation Of Revenue [Line Items]
Total net revenue	826	945	1,578	2,168
Europe and the Middle East
Disaggregation Of Revenue [Line Items]
Total net revenue	3,626	2,630	6,086	5,230
Europe and the Middle East | Point-in-Time
Disaggregation Of Revenue [Line Items]
Total net revenue	3,531	2,535	5,895	5,038
Europe and the Middle East | Over Time
Disaggregation Of Revenue [Line Items]
Total net revenue	95	95	191	192
Asia-Pacific
Disaggregation Of Revenue [Line Items]
Total net revenue	6,159	2,805	10,713	4,457
Asia-Pacific | Point-in-Time
Disaggregation Of Revenue [Line Items]
Total net revenue	$ 6,159	$ 2,805	$ 10,713	$ 4,457