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Note 9 - Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2022
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   

Six-month period ended June 30,

 
   

2022

   

2021

 

Accrued warranty obligations – beginning

  $ 133     $ 149  

Accruals for warranties issued

    25       121  

Settlements made

    (26 )     (108 )

Accrued warranty obligations – ending

  $ 132     $ 162