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PROPERTY AND EQUIPMENT, NET - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Property, Plant and Equipment [Abstract]        
Depreciation expense $ 325,643 $ 234,297 $ 889,820 $ 655,385