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Note 16 - Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2019
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
Ju
ne 30
,
   
Ju
ly
1
,
   
Ju
ne
30
,
   
Ju
ly
1
,
 
   
201
9
   
201
8
   
201
9
   
201
8
 
   
(Unaudited)
   
(Unaudited)
 
                                 
Service cost
  $
1
    $
0
    $
2
    $
2
 
Interest cost on projected benefit obligation
   
375
     
325
     
704
     
658
 
Net amortizations, deferrals and other costs
   
175
     
148
     
333
     
316
 
Expected return on plan assets
   
(217
)
   
(326
)
   
(542
)
   
(652
)
Net periodic benefit cost
  $
334
    $
147
    $
497
    $
324
 
Net Periodic Benefit Cost Recognized in Income Statement [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
Ju
ne 30
,
   
July
1
,
   
Ju
ne 30
,
   
July
1
,
 
   
201
9
   
201
8
   
201
9
   
201
8
 
   
(Unaudited)
   
(Unaudited)
 
Service cost:
                               
Selling, general and administrative expenses
  $
1
    $
0
    $
2
    $
2
 
Other net periodic benefit costs:
                               
Other (income), net
   
333
     
147
     
495
     
322
 
Total
  $
334
    $
147
    $
497
    $
324