INTANGIBLE ASSETS, NET - Schedule of Intangible Assets (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 7,946,940	$ 6,576,816
Less: Accumulated amortization	3,436,779	2,756,356
Intangible assets, net	4,510,161	3,820,460
Trademarks
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	368,948	309,395
Software
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	2,536,467	2,288,062
Trade name
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	486,586	492,408
Contractual and customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	3,948,381	3,010,480
Non-compete
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	400,748	268,459
Other
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 205,810	$ 208,012