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Note 5 - Inventory
12 Months Ended
Dec. 31, 2019
Notes to Financial Statements  
Inventory Disclosure [Text Block]
5
)
Inventory
 
The carrying values of inventory were as follows as of
December 31:
 
   
2019
   
2018
 
At average cost (approximates current cost)
               
Finished goods
  $
22,564
    $
23,658
 
Work in process
   
2,768
     
2,100
 
Raw materials and supplies
   
20,121
     
23,909
 
     
45,453
     
49,667
 
LIFO reserve
   
(7,880
)    
(10,371
)
Total inventory
  $
37,573
    $
39,296
 
 
There was
no
lower of cost or market adjustment for the years ended
December 31, 2019
and
2018.