Balance Sheet Components - Summary of Property Plant and Equipment and Rental Equipment with Associated Accumulated Depreciation (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Property Plant And Equipment [Line Items]
Property and equipment	$ 90,685	$ 90,595
Accumulated depreciation	51,356	51,669
Property and equipment, net	39,329	38,926
Rental equipment
Property Plant And Equipment [Line Items]
Property and equipment	59,387	59,073
Accumulated depreciation	33,668	33,355
Property and equipment, net	25,719	25,718
Other property and equipment
Property Plant And Equipment [Line Items]
Property and equipment	31,298	31,522
Accumulated depreciation	17,688	18,314
Property and equipment, net	$ 13,610	$ 13,208