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Note 10 - Income Taxes (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
   
Three-month periods ended
   
Nine
-month periods ended
 
   
September 30
,
   
October 1
,
   
September 30
,
   
October 1
,
 
   
2018
   
2017
   
2018
   
2017
 
Current Income Tax Provision:
                               
Foreign
  $
64
    $
48
    $
153
    $
199
 
Federal
   
-
     
14
     
-
     
42
 
State
   
4
     
4
     
12
     
12
 
Deferred Income Tax Provision
   
18
     
38
     
54
     
117
 
Total
  $
86
    $
104
    $
219
    $
370
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Nine
-Month P
erio
ds E
nded
 
   
September 30
,
   
October 1
,
 
   
2018
   
2017
 
             
Income Before Income Taxes
 
$5,461
   
$4,226
 
             
Income Tax Provision
 
219
   
370
 
             
Effective Income Tax Rate
 
4.0%
   
8.8%