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Note 4 - Exit and Disposal Activities (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Restructuring and Related Costs [Table Text Block]
   
 
 
 
 
Costs Incurred
 
 
 
 
 
   
Year
   
Total
   
Remaining
   
 
 
 
   
Total
   
Ended
   
Recognized
   
Costs to be
 
   
Program
   
Dec. 31, 2018
   
to date
   
Recognized
 
Severance and benefit related costs
  $
1,350
    $
0
    $
1,350
    $
0
 
Asset impairments
   
188
     
0
     
188
     
0
 
Equipment relocation costs
   
1,955
     
361
     
1,785
     
170
 
Other
   
1,308
     
1,033
     
1,078
     
230
 
    $
4,801
    $
1,394
    $
4,401
    $
400
 
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
   
Accrued
   
Cash
   
Accrued
   
 
 
 
   
Balance at
   
Payments
   
Balance at
   
 
 
 
   
Dec. 31,
   
2018
   
or Asset
   
Dec. 31,
 
   
2017
   
Charge
   
Write-Offs
   
2018
 
Severance and benefit-related costs
  $
145
    $
0
    $
(145
)   $
0
 
Equipment relocation costs
   
0
     
361
     
(361
)    
0
 
Other
   
0
     
1,033
     
(1,033
)    
0
 
    $
145
    $
1,394
    $
(1,539
)   $
0
 
Disposal Groups, Including Discontinued Operations [Table Text Block]
   
December 31,
 
   
2018
   
2017
 
Property, plant and equipment
  $
11,207
    $
28,874
 
Accumulated depreciation
   
(9,733
)    
(25,976
)
Property, plant and equipment, net
  $
1,474
    $
2,898