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Note 12 - Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Product Warranty Liability [Table Text Block]
   
Nine
-Month P
eriod
s
E
nded
 
   
September 30
,
2018
   
October 1
,
2017
 
Accrued Warranty Obligations – Beginning
  $
149
    $
172
 
Accruals for Warranties Issued
   
(9
)    
66
 
Settlements Made
   
(54
)    
(58
)
Accrued Warranty Obligations – Ending
  $
86
    $
180