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Note 5 - Property and Equipment, Net (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

September 30,

  

December 31,

 
  

2021

  

2020

 

Production and lab equipment

 $450  $148 

Tooling

  188   81 

Computer equipment

  408   180 

Furniture, fixtures and improvements

  177   165 
   1,223   574 

Accumulated depreciation

  (335)  (217)

Property and equipment, net

 $888  $357