Revenue - Summary of Revenue Disaggregated by Types and Geography (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Total revenue	$ 70,119	$ 57,017	$ 87,782
Product
Disaggregation Of Revenue [Line Items]
Total revenue	51,865	42,742	79,504
Service
Disaggregation Of Revenue [Line Items]
Total revenue	17,779	13,800	7,803
Distribution rights
Disaggregation Of Revenue [Line Items]
Total revenue	475	475	475
U.S.
Disaggregation Of Revenue [Line Items]
Total revenue	42,168	16,167	46,236
U.S. | Product
Disaggregation Of Revenue [Line Items]
Total revenue	31,769	8,428	41,985
U.S. | Service
Disaggregation Of Revenue [Line Items]
Total revenue	10,399	7,739	4,251
Outside of U.S. ("OUS")
Disaggregation Of Revenue [Line Items]
Total revenue	27,951	40,850	41,546
Outside of U.S. ("OUS") | Product
Disaggregation Of Revenue [Line Items]
Total revenue	20,096	34,314	37,519
Outside of U.S. ("OUS") | Service
Disaggregation Of Revenue [Line Items]
Total revenue	7,380	6,061	3,552
Outside of U.S. ("OUS") | Distribution rights
Disaggregation Of Revenue [Line Items]
Total revenue	$ 475	$ 475	$ 475