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Note 6 - Product Warranties (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
  

March 31,

 
  

2022

  

2021

 

Balance at beginning of year

 $1,637  $1,361 

Provision

  389   510 

Claims

  (313)  (395

)

Balance at end of period

 $1,713  $1,476