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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2021
INVENTORIES [Abstract]  
Inventories
Inventories are presented net of reserves and consist of the following at:

 
March 31, 2021
   
December 31, 2020
 
Raw materials
 
$
6,747,142
   
$
5,955,215
 
Work in process
   
4,949,068
     
2,549,516
 
Finished goods
   
2,994,417
     
4,011,671
 
   
$
14,690,627
   
$
12,516,402