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Note 6 - Property and Equipment, Net - Summary of Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Property and equipment, gross $ 1,416 $ 574
Accumulated depreciation (440) (217)
Property and equipment, net 976 357
Production and Lab Equipment [Member]    
Property and equipment, gross 500 148
Tooling [Member]    
Property and equipment, gross 273 81
Computer Equipment [Member]    
Property and equipment, gross 467 180
Furniture and Fixtures [Member]    
Property and equipment, gross $ 176 $ 165