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Note 9 - Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   

Nine-month period ended

 
   

September 30,

2020

   

September 29,

2019

 

Accrued warranty obligations – beginning

  $ 195     $ 95  

Assumed warranty obligations – SWE

    -       145  

Accruals for warranties issued

    75       152  

Settlements made

    (103 )     (167 )

Accrued warranty obligations – ending

  $ 167     $ 225