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Note 18 - Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
December 31,
 
   
2019
    
2018
  
Pension liability adjustment, net of income tax benefit of $671 and $911
   $
(1,770
 )   $
(1,551
 )
Unrealized gain (loss) on cash flow hedges, net of income tax expense (benefit) of $(11) and $8
    
(44
 )    
15
  
Total
   $
(1,814
 )   $
(1,536
 )
Schedule of Changes in Accumulated Other Comprehensive Income Loss [Table Text Block]
   
Pension Liability
Adjustment
    
Unrealized Gain
(Loss) on Cash
Flow Hedges
    
Total
  
                         
Balance, December 31, 2018
   $
(1,551
 )   $
15
     $
(1,536
 )
                         
Cumulative-effect adjustment for ASU 2018-02 (Note 2)
    
(235
 )    
-
      
(235
 )
                         
Other comprehensive loss before reclassifications
    
(6
 )    
(52
 )    
(58
 )
Amounts reclassified from Accumulated other comprehensive loss
    
22
      
(7
 )    
15
  
Net current period adjustments to Other comprehensive income (loss)
    
16
      
(59
 )    
(43
 )
                         
Balance, December 31, 2019
   $
(1,770
 )   $
(44
 )   $
(1,814
 )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]
   
Amount reclassified from Accumulated Other
Comprehensive Loss
  
Affected line item in the
Details about Accumulated Other
  
Year Ended December 31,
 
Consolidated Statements
Comprehensive Loss Components
  
2019
    
2018
    
2017
  
of Operations
                           
Pension liability adjustment:
                          
Net periodic pension cost:
                          
Service cost
   $
(11
 )   $
(11
 )   $
(11
 )
Cost of sales
Non-service cost
    
(15
 )    
52
      
8
  
Other income
Associated income tax benefit
    
4
      
8
      
-
  
Income tax expense (benefit)
     
(22
 )    
49
      
(3
 )
 
Unrealized gain on cash flow hedges:
                          
Gain on cash flow hedges
    
5
      
13
      
5
  
Net sales
Associated income tax (expense) benefit
    
2
      
(1
 )    
(2
 )
Income tax expense (benefit)
     
7
      
12
      
3
  
 
Total reclassifications for the period
   $
(15
 )   $
61
     $
-