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Note 6 - Inventories, Net
6 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Inventory Disclosure [Text Block]
Note
6
-
Inventories, Net
 
   
June 30,
201
8
   
December 31,
2017
 
Raw materials
  $
2,249,764
    $
2,632,415
 
Work in process
 
 
2,957,923
     
3,386,078
 
Finished goods
 
 
14,555,629
     
13,347,620
 
Allowance for excess quantities
 
 
(469,654)
     
(500,181
)
Total inventories
  $
19,293,662
    $
18,865,932