Quarterly report pursuant to Section 13 or 15(d)

Balance Sheet Components - Summary of Property Plant and Equipment and Rental Equipment with Associated Accumulated Depreciation (Details)

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Balance Sheet Components - Summary of Property Plant and Equipment and Rental Equipment with Associated Accumulated Depreciation (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Property Plant And Equipment [Line Items]    
Property and equipment $ 87,464 $ 74,024
Accumulated depreciation 50,398 45,794
Property and equipment, net 37,066 28,230
Rental equipment    
Property Plant And Equipment [Line Items]    
Property and equipment 55,612 46,953
Accumulated depreciation 32,178 30,283
Property and equipment, net 23,434 16,670
Other property and equipment    
Property Plant And Equipment [Line Items]    
Property and equipment 31,852 27,071
Accumulated depreciation 18,220 15,511
Property and equipment, net $ 13,632 $ 11,560