REVENUE - Summary of Revenue Disaggregated by Types and Geography (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation Of Revenue [Line Items]
Total revenue	$ 18,876	$ 15,525
Product
Disaggregation Of Revenue [Line Items]
Total revenue	13,426	11,379
Service
Disaggregation Of Revenue [Line Items]
Total revenue	5,331	4,027
Distribution rights
Disaggregation Of Revenue [Line Items]
Total revenue	119	119
U.S.
Disaggregation Of Revenue [Line Items]
Total revenue	3,531	7,434
U.S. | Product
Disaggregation Of Revenue [Line Items]
Total revenue	432	5,067
U.S. | Service
Disaggregation Of Revenue [Line Items]
Total revenue	3,099	2,367
Outside of U.S. ("OUS")
Disaggregation Of Revenue [Line Items]
Total revenue	15,345	8,091
Outside of U.S. ("OUS") | Product
Disaggregation Of Revenue [Line Items]
Total revenue	12,994	6,312
Outside of U.S. ("OUS") | Service
Disaggregation Of Revenue [Line Items]
Total revenue	2,232	1,660
Outside of U.S. ("OUS") | Distribution rights
Disaggregation Of Revenue [Line Items]
Total revenue	$ 119	$ 119