Annual report pursuant to Section 13 and 15(d)

Balance Sheet Components - Property and equipment, net (Details)

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Balance Sheet Components - Property and equipment, net (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Balance Sheet Components    
Property and equipment, gross $ 829 $ 1,120
Less: Accumulated depreciation and amortization (655) (958)
Property and equipment, net 174 162
Machinery and equipment    
Balance Sheet Components    
Property and equipment, gross 691 965
Tooling    
Balance Sheet Components    
Property and equipment, gross 127 40
Computer software    
Balance Sheet Components    
Property and equipment, gross $ 11 11
Furniture and fixtures    
Balance Sheet Components    
Property and equipment, gross   89
Leasehold improvements    
Balance Sheet Components    
Property and equipment, gross   $ 15