Quarterly report pursuant to Section 13 or 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
Sep. 30, 2023
Dec. 31, 2022
Balance Sheet Components    
Property and equipment, gross $ 752 $ 829
Less: Accumulated depreciation and amortization (643) (655)
Property and equipment, net 109 174 [1]
Machinery and equipment    
Balance Sheet Components    
Property and equipment, gross 741 691
Leasehold improvements    
Balance Sheet Components    
Property and equipment, gross   127
Tooling    
Balance Sheet Components    
Property and equipment, gross $ 11 $ 11
[1] The condensed consolidated balance sheet as of December 31, 2022 was derived from the audited consolidated balance sheet as of that date.