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PROPERTY, PLANT, AND EQUIPMENT (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Property, plant, and equipment      
Property, plant and equipment, gross $ 35,137,112 $ 35,045,231  
Accumulated depreciation (23,783,910) (22,953,194)  
Property, plant and equipment, net 11,353,202 12,092,037  
Depreciation expense 830,715 867,080 $ 849,804
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 11,561,320  
Production equipment      
Property, plant, and equipment      
Property, plant and equipment, gross 19,742,577 17,864,346  
Office furniture and equipment      
Property, plant, and equipment      
Property, plant and equipment, gross 3,500,834 3,415,985  
Construction in Progress      
Property, plant, and equipment      
Property, plant and equipment, gross $ 65,693 $ 1,941,687