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Note 17 - Employee Benefit Plans (Tables)
6 Months Ended
Jul. 01, 2018
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
Ju
ly
1
,
   
Ju
ly
2
,
   
Ju
ly
1
,
   
Ju
ly
2
,
 
   
201
8
   
201
7
   
201
8
   
201
7
 
   
(Unaudited)
   
(Unaudited)
 
                                 
Service cost
  $
0
    $
1
    $
2
    $
3
 
Interest cost on projected benefit obligation
   
325
     
371
     
658
     
759
 
Net amortizations, deferrals and other costs
   
148
     
163
     
316
     
346
 
Expected return on plan assets
   
(326
)
   
(491
)
   
(652
)
   
(906
)
Net periodic benefit cost
  $
147
    $
44
    $
324
    $
202
 
Schedule of Costs of Retirement Plans [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
July
1
,
   
July
2
,
   
July
1
,
   
July
2
,
 
   
201
8
   
201
7
   
201
8
   
201
7
 
   
(Unaudited)
   
(Unaudited)
 
Service cost:
                               
Selling, general and administrative expenses
  $
0
    $
(1
)   $
(2
)
  $
(3
)
Other net periodic benefit costs:
                               
Other (income), net
   
(147
)
   
(43
)
   
(322
)
   
(199
)
Total
  $
(147
)
  $
(44
)
  $
(324
)
  $
(202
)