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Note 10 - Commitments and Contingencies (Tables)
9 Months Ended
Sep. 29, 2019
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   
Nine-Month Period Ended
 
   
September 29,
2019
   
September 30,
2018
 
Accrued warranty obligations – beginning
  $
95
    $
149
 
Assumed warranty obligations – SWE
   
145
     
-
 
Accruals for warranties issued
   
152
     
(9
)
Settlements made
   
(167
)    
(54
)
Accrued warranty obligations – ending
  $
225
    $
86