INTANGIBLE ASSETS, NET - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Net Carrying Amount
Gross Carrying Amount	$ 31,971	$ 29,514
Accumulated Amortization	19,730	17,687
Net Carrying Amount	$ 12,241	11,827
Customer relations
Net Carrying Amount
Useful Life (in years)	5 years
Gross Carrying Amount	$ 978	978
Accumulated Amortization	978	974
Net Carrying Amount	$ 0	4
Vendor relations
Net Carrying Amount
Useful Life (in years)	10 years
Gross Carrying Amount	$ 4,778	4,778
Accumulated Amortization	4,607	4,575
Net Carrying Amount	$ 171	203
Trademark/Trade name
Net Carrying Amount
Useful Life (in years)	15 years
Gross Carrying Amount	$ 887	887
Accumulated Amortization	632	608
Net Carrying Amount	$ 255	279
TCEP Technology/Patent
Net Carrying Amount
Useful Life (in years)	15 years
Gross Carrying Amount	$ 13,287	13,287
Accumulated Amortization	9,281	8,838
Net Carrying Amount	$ 4,006	4,449
Non-compete
Net Carrying Amount
Useful Life (in years)	3 years
Gross Carrying Amount	$ 197	197
Accumulated Amortization	197	197
Net Carrying Amount	$ 0	0
Software
Net Carrying Amount
Useful Life (in years)	3 years
Gross Carrying Amount	$ 9,344	9,387
Accumulated Amortization	4,021	2,495
Net Carrying Amount	$ 5,323	6,892
Licensing Fee
Net Carrying Amount
Useful Life (in years)	30 years
Gross Carrying Amount	$ 2,500	0
Accumulated Amortization	14	0
Net Carrying Amount	$ 2,486	$ 0