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Note 5 - Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   

2022

   

2021

 

Accrued warranty obligations – beginning

  $ 133     $ 149  

Accruals for warranties issued

    287       142  

Settlements made

    (97 )     (158 )

Accrued warranty obligations - ending

  $ 323     $ 133