GOODWILL - Summary of Changes in the carrying amount of goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill, Beginning Balance	$ 0
Support acquisition	45,369
Goodwill impairment charge	(42,307)	$ 0
Goodwill, Ending Balance	$ 3,062	$ 0

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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