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Balance Sheet Components - Summary of Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 2,772 $ 3,005
Less: Accumulated depreciation (1,379) (1,434)
Property and equipment, net 1,393 1,571
Tools and Equipment    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 2,085 2,173
Computer Equipment and Software    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 37 37
Furniture and Fixtures    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 183 282
Leasehold Improvements    
Property Plant And Equipment [Line Items]    
Property and equipment, gross 38 38
Construction In Process    
Property Plant And Equipment [Line Items]    
Property and equipment, gross $ 429 $ 475