FAIR VALUE - Additional Information (Details)	9 Months Ended
Sep. 30, 2021 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value transfers between level 1 and level 2	$ 0
Loans Receivable [Member] \| Property A [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Discount rate	15.00%
Age of appraisal	12 months

Amount of transfers of assets measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

Name:	us-gaap_FairValueAssetsLevel1ToLevel2TransfersAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant