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PROPERTY AND EQUIPMENT (Schedule of major classes of property and equipment) (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jun. 30, 2020
Property, Plant and Equipment [Abstract]      
Furniture, fixtures and equipment $ 1,290,183 $ 1,074,976  
Less: Accumulated depreciation (1,030,002) (870,750)  
Furniture, fixtures and equipment, Net 260,181 204,226 $ 346,979
Depreciation $ 159,252 $ 73,530