RELATED-PARTY TRANSACTIONS - Fees and Expense Reimbursements (Details) - Affiliated Entity - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Aug. 09, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
CIM Service Provider, LLC | Series A Preferred Stock
Related Party Transaction [Line Items]
Related party, shares issued (in shares)			11,273		11,273
Asset management fees
Related Party Transaction [Line Items]
Related party, amount of transaction		$ 2,260	$ 2,376	$ 4,519	$ 4,739
Property management fees
Related Party Transaction [Line Items]
Related party, amount of transaction		404	370	807	797
Onsite management and other cost reimbursement
Related Party Transaction [Line Items]
Related party, amount of transaction		755	615	1,564	1,584
Lease commissions
Related Party Transaction [Line Items]
Related party, amount of transaction		33	43	48	83
Construction management fees
Related Party Transaction [Line Items]
Related party, amount of transaction		22	107	35	277
Base service fee
Related Party Transaction [Line Items]
Related party, amount of transaction		0	0	0	282
Expense reimbursements to related parties - corporate
Related Party Transaction [Line Items]
Related party, amount of transaction		454	615	1,059	1,427
Expenses reimbursement to related parties - lending segment
Related Party Transaction [Line Items]
Related party, amount of transaction		433	998	1,164	1,680
Upfront dealer manager and trailing dealer manager fees
Related Party Transaction [Line Items]
Related party, amount of transaction		272	350	422	589
Non-issuance specific offering costs
Related Party Transaction [Line Items]
Related party, amount of transaction		43	$ 21	64	$ 45
Related party, deferred costs		$ 2,000		$ 2,000		$ 1,500
Investment Management Agreement | CIM Capital, LLC
Related Party Transaction [Line Items]
Related party, shares issued (in shares)			203,349		203,349
Investment Management Agreement | CIM Capital, LLC | Series A Preferred Stock
Related Party Transaction [Line Items]
Related party, shares issued (in shares)			95,245
Investment Management Agreement | CIM Capital, LLC | Series A Preferred Stock | Subsequent Event
Related Party Transaction [Line Items]
Related party, shares issued (in shares)	89,338