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Note 19 - Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Stockholders Equity [Table Text Block]
   
December 31,
 
   
2018
   
2017
 
Foreign currency translation adjustments, net of tax
  $
(10,967
)   $
(10,915
)
Employee benefit related adjustments – U.S, net of tax.
   
(14,177
)    
(14,748
)
Employee benefit related adjustments – Mexico, net of tax
   
302
     
112
 
                 
Accumulated other comprehensive loss
  $
(24,842
)   $
(25,551
)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
 
 
 
 
 
 
 
 
Accumulated
 
   
Foreign
   
Defined
   
Other
 
   
Currency
   
Benefit
   
Comprehensive
 
   
Translation
   
Plans
   
Loss
 
Balance at January 1, 2017
  $
(11,334
)   $
(15,264
)   $
(26,598
)
Currency translation adjustments, net of tax
   
419
     
0
     
419
 
Net actuarial gain for the year, net of tax
   
0
     
205
     
205
 
Amortization for the year, net of tax
   
0
     
423
     
423
 
                         
Balance at December 31, 2017
   
(10,915
)    
(14,636
)    
(25,551
)
                         
Currency translation adjustments, net of tax
   
(52
)    
0
     
(52
)
Net actuarial gain for the year, net of tax
   
0
     
276
     
276
 
Amortization for the year, net of tax
   
0
     
485
     
485
 
                         
Balance at December 31, 2018
  $
(10,967
)   $
(13,875
)   $
(24,842
)