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PROPERTY, PLANT, AND EQUIPMENT (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, plant, and equipment      
Property, plant and equipment, gross $ 36,023,997 $ 35,519,266  
Accumulated depreciation (25,391,940) (24,667,519)  
Property, plant and equipment, net 10,632,057 10,851,747  
Depreciation expense 851,673 883,610 $ 830,715
Land      
Property, plant, and equipment      
Property, plant and equipment, gross 261,893 261,893  
Building and building Improvements      
Property, plant, and equipment      
Property, plant and equipment, gross 11,566,115 11,566,115  
Production equipment      
Property, plant, and equipment      
Property, plant and equipment, gross 19,903,236 19,948,303  
Office furniture and equipment      
Property, plant, and equipment      
Property, plant and equipment, gross 3,527,577 3,540,846  
Construction in Progress      
Property, plant, and equipment      
Property, plant and equipment, gross $ 765,176 $ 202,109