DISCONTINUED OPERATIONS - Non-Cash Items Related to Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Cash Flows From Operating Activities:
Stock-based compensation (income) expense*	$ (893)	$ (2,442)
(Gain) on the sale of the MST Franchise	13,005	0
Supplemental disclosure of cash flow information:
Amount due from sale of MST Franchise	5,000	0
Discontinued Operations, Disposed of by Sale \| MST Franchise
Cash Flows From Operating Activities:
Stock-based compensation (income) expense*	(352)	382
(Gain) on the sale of the MST Franchise	(13,005)	0
Total non-cash items of discontinued operations	$ (13,357)	$ 382

Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration