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Note 16 - Employee Benefit Plans (Tables)
3 Months Ended
Apr. 01, 2018
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
   
Three Months Ended
 
   
April 1,
   
April 2,
 
   
2018
   
2017
 
   
(Unaudited)
 
Service cost
  $
2
    $
2
 
Interest cost on projected benefit obligation
   
333
     
388
 
Net amortizations of actuarial loss
   
168
     
183
 
Expected return on plan assets
   
(326
)    
(415
)
Net periodic benefit cost
  $
177
    $
158
 
Schedule of Costs of Retirement Plans [Table Text Block]
   
Three Months Ended
 
   
April 1,
   
April 2,
 
   
2018
   
2017
 
   
(Unaudited)
 
Service cost:
               
Selling, general and administrative expenses
   
(2
)    
(2
)
Other net periodic benefit costs:
               
Other (income), net
   
(175
)    
(156
)
Total
  $
(177
)   $
(158
)