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Composition of Certain Financial Statement Items - Schedule of Property and Equipment (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross $ 37,240 $ 35,740
Less: accumulated depreciation and amortization (31,707) (30,916)
Total property and equipment, net 5,533 4,824
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 2,553 2,597
Software and software development    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 2,437 2,438
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 1,684 1,700
Tooling    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 12,793 11,250
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross 2,008 1,988
Demonstration units and convention booths    
Property, Plant and Equipment [Line Items]    
Total property and equipment, gross $ 15,765 $ 15,767