RELATED-PARTY TRANSACTIONS - Asset Management and Other Fees to Related Parties Narrative (Details) $ in Millions	May 11, 2020	Apr. 09, 2020	Jan. 28, 2020	Jan. 01, 2019 subsidiary	May 10, 2018	Dec. 31, 2020 shares	Mar. 11, 2014 USD ($)
Related Party Transaction [Line Items]
Wholesaling agreement, percent of selling price fee per share					2.75%
Affiliated Entity | C I M Service Provider LLC | Series A Preferred Stock
Related Party Transaction [Line Items]
Related party, shares issued (in shares)						11,273
Affiliated Entity | Investment Management Agreement | CIM Capital, LLC | Series A Preferred Stock
Related Party Transaction [Line Items]
Related party, shares issued (in shares)						190,459
Affiliated Entity | Investment Management Agreement | CIM Capital, LLC | Common Stock
Related Party Transaction [Line Items]
Related party, shares issued (in shares)						203,349
Affiliated Entity | Master Services Agreement, Amendment, Quarterly Incentive Fee | C I M Service Provider LLC
Related Party Transaction [Line Items]
Related party transaction, rate	15.00%
Affiliated Entity | Master Services Agreement, Amendment, Quarterly Incentive Fee, Threshold For Eligibility, Per Quarter | C I M Service Provider LLC
Related Party Transaction [Line Items]
Related party transaction, rate	1.75%
Affiliated Entity | Master Services Agreement, Amendment, Quarterly Incentive Fee, Threshold For Eligibility, Annualized | C I M Service Provider LLC
Related Party Transaction [Line Items]
Related party transaction, rate	7.00%
Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Upfront Dealer Manager Fee | CCO Capital, LLC
Related Party Transaction [Line Items]
Related party transaction, rate			1.25%
Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Selling Commissions Payable | CCO Capital, LLC
Related Party Transaction [Line Items]
Related party transaction, rate			5.50%
Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Trailing Dealer Manager Fee, Annual | CCO Capital, LLC
Related Party Transaction [Line Items]
Related party transaction, rate			0.25%
Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Amendment No. 1, Selling Commissions Payable | CCO Capital, LLC
Related Party Transaction [Line Items]
Related party transaction, rate		7.00%
Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Trailing Dealer Manager Fee, Daily Accruing Rate Of Annual Rate | CCO Capital, LLC
Related Party Transaction [Line Items]
Related party transaction, rate			0.27%
C I M Service Provider LLC | Master Services Agreement
Related Party Transaction [Line Items]
Related party, fees payable per year under agreement | $							$ 1.0
CIM Capital, LLC
Related Party Transaction [Line Items]
Number of subsidiaries | subsidiary				4
CCO Capital, LLC | Second Amended And Restated Dealer Manager Agreement, Amendment No. 1, Reallowance Of Selling Commissions
Related Party Transaction [Line Items]
Related party transaction, rate		100.00%