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Note 8 - Inventories, Net (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
December 31,
201
9
    
December 31,
201
8
  
Raw materials
   $
1,544,949
     $
1,994,741
  
Work in Process
    
3,110,296
      
3,052,224
  
Finished Goods
    
9,766,060
      
12,300,010
  
In Transit
    
99,923
      
480,716
  
Allowance for excess quantities
    
(561,729
 )    
(439,057
)
Total inventories
   $
13,959,499
     $
17,388,634