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Note 7 - Inventories
12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Inventory Disclosure [Text Block]
7.
Inventories
 
Inventories are stated at the lower of cost or net realizable value. Cost is determined using standard costs which approximate costing determined on a
first
-in,
first
out basis. Standard costs are reviewed and adjusted periodically and at year end based on actual direct and indirect production costs. On a periodic basis, the Company reviews its inventory for estimated obsolescence or unmarketable items,
primarily by reviewing future demand requirements and shelf life of the product.
 
Inventories
are comprised of the following:
 
   
December 31,
201
7
   
December 31,
201
6
 
Raw materials
  $
2,632,415
    $
3,310,310
 
Work in Process
   
3,386,078
     
1,942,600
 
Finished Goods
   
13,347,620
     
13,889,328
 
Allowance for excess quantities
   
(500,181
)    
(794,227
)
Total inventories
  $
18,865,932
    $
18,348,011