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Balance Sheet Components - Summary of Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 2,931 $ 2,658
Less: Accumulated depreciation (1,363) (1,204)
Property and equipment, net 1,568 1,454
Tools and Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 2,154 1,685
Computer Equipment and Software    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 91 100
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 246 254
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 34 29
Construction In Process    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 406 $ 590