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Note 6 - Property and Equipment, Net (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  December 31, 
  

2021

  

2020

 

Production and lab equipment

 $500  $148 

Tooling

  273   81 

Computer equipment

  467   180 

Furniture, fixtures and improvements

  176   165 
   1,416   574 

Accumulated depreciation

  (440)  (217)

Property and equipment, net

 $976  $357