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Note 1 - Description of Business and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

As of December 31,

 
  

2022

  

2021

 

Balance, beginning of period

 $125  $33 

Increase of warranty reserve

  23   70 

Warranty claims

  3   22 

Other adjustments

  (2)   

Balance, end of period

 $149  $125