GOODWILL AND INTANGIBLE ASSETS, NET - Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Intangible assets subject to amortization (Definite-lived)
Gross	$ 24,548	$ 24,548
Accumulated Amortization	(13,492)	(11,655)
Total	11,056	12,893
Customer relationships
Intangible assets subject to amortization (Definite-lived)
Gross	16,852	16,852
Accumulated Amortization	(8,145)	(7,022)
Total	8,707	9,830
Non-compete agreements
Intangible assets subject to amortization (Definite-lived)
Gross	94	94
Accumulated Amortization	(94)	(94)
Total	0	0
Licenses and permits
Intangible assets subject to amortization (Definite-lived)
Gross	1,471	1,471
Accumulated Amortization	(808)	(707)
Total	663	764
Developed technology
Intangible assets subject to amortization (Definite-lived)
Gross	6,131	6,131
Accumulated Amortization	(4,445)	(3,832)
Total	$ 1,686	$ 2,299