Revenue From Contracts With Customers - Summary of Product and Service Revenue Disaggregated by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation Of Revenue [Line Items]
Product and service revenue	$ 6,276	$ 6,987	$ 20,840	$ 19,701
United States
Disaggregation Of Revenue [Line Items]
Product and service revenue	4,367	3,521	12,434	10,901
South Korea
Disaggregation Of Revenue [Line Items]
Product and service revenue	74	1,165	2,170	3,353
Europe
Disaggregation Of Revenue [Line Items]
Product and service revenue	805	908	3,380	2,718
Asia (Excluding South Korea)
Disaggregation Of Revenue [Line Items]
Product and service revenue	932	1,278	2,483	2,453
Other
Disaggregation Of Revenue [Line Items]
Product and service revenue	$ 98	$ 115	$ 373	$ 276