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PROPERTY AND EQUIPMENT, NET - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Property, Plant and Equipment [Abstract]        
Depreciation expense $ 293,860 $ 220,270 $ 564,177 $ 421,088