GOODWILL AND INTANGIBLE ASSETS, NET -Schedule of Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Accumulated Amortization	$ 10,139,046	$ 8,717,192
Net Carrying Amount	12,578,519
Goodwill	0	176,349
Gross Carrying Amount, Total	22,717,565	23,216,546
Net Carrying Amount, Total	12,578,519	14,499,354
Customer relations
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,329,580	1,588,700
Accumulated Amortization	718,890	872,654
Net Carrying Amount	$ 610,690	716,046
Vendor relations
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	10 years
Gross Carrying Amount	$ 6,654,497	6,654,497
Accumulated Amortization	3,531,764	2,866,314
Net Carrying Amount	3,122,733	3,788,183
Trademark/Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,249,887	1,321,000
Accumulated Amortization	436,869	423,514
Net Carrying Amount	$ 813,018	897,486
TCEP Technology/Patent
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	15 years
Gross Carrying Amount	$ 13,287,000	13,287,000
Accumulated Amortization	5,294,843	4,409,043
Net Carrying Amount	7,992,157	8,877,957
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	196,601	189,000
Accumulated Amortization	156,680	145,667
Net Carrying Amount	$ 39,921	$ 43,333
Minimum | Customer relations
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	5 years
Minimum | Trademark/Trade name
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	6 years
Minimum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	3 years
Maximum | Customer relations
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	8 years
Maximum | Trademark/Trade name
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	16 years
Maximum | Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Useful Life (in years)	5 years