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PROPERTY, PLANT, AND EQUIPMENT (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Property, plant, and equipment      
Property, plant and equipment, gross $ 35,519,266 $ 35,137,112  
Accumulated depreciation (24,667,519) (23,783,910)  
Property, plant and equipment, net 10,851,747 11,353,202  
Depreciation expense 883,610 830,715 $ 867,080
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 19,948,303 19,742,577  
Office furniture, fixtures, and equipment      
Property, plant, and equipment      
Property, plant and equipment, gross 3,540,846 3,500,834  
Construction in Progress      
Property, plant, and equipment      
Property, plant and equipment, gross $ 202,109 $ 65,693