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PROPERTY AND EQUIPMENT, NET (Tables)
3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and equipment
    March 31,     December 31,  
    2021     2020  
Production and lab equipment   $ 148     $ 148  
Tooling     173       81  
Computer equipment     249       180  
Furniture, fixtures and improvements     160       165  
      730       574  
Accumulated depreciation     (267 )     (217 )
Property and equipment, net   $ 463     $ 357