RELATED-PARTY TRANSACTIONS (Details) ft² in Thousands						3 Months Ended		6 Months Ended
	May 11, 2020	Apr. 09, 2020	Jan. 28, 2020	Jan. 01, 2019 subsidiary	May 10, 2018	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jul. 08, 2020 shares	Apr. 10, 2020 shares	Dec. 31, 2019 USD ($)	Aug. 07, 2019 ft²	May 15, 2019 ft²	Oct. 01, 2015	Mar. 11, 2014 USD ($)
Related Party Transaction [Line Items]
Due to related parties						$ 8,014,000		$ 8,014,000				$ 9,431,000
Wholesaling agreement, percent of selling price fee per share					2.75%
Related party, stock issuance costs								501,000	$ 336,000
CIM Urban REIT Management, L.P. | Asset Management Fees
Related Party Transaction [Line Items]
Related party, amount of transaction						2,376,000	$ 2,919,000	4,739,000	7,245,000
Due to related parties						2,375,000		2,375,000				2,356,000
CIM Urban REIT Management, L.P. | Property Management Fees
Related Party Transaction [Line Items]
Related party, amount of transaction						370,000	607,000	797,000	1,612,000
Affiliated Entity | Investment Management Agreement
Related Party Transaction [Line Items]
Related party, percent of common stock outstanding											1.40%
CIM Management Entities
Related Party Transaction [Line Items]
Due to related parties						1,272,000		1,272,000				4,107,000
CIM Management Entities | Personnel Fees
Related Party Transaction [Line Items]
Related party, amount of transaction						615,000	1,406,000	1,584,000	3,036,000
CIM Management Entities | Lease Commission Fees
Related Party Transaction [Line Items]
Related party, amount of transaction						43,000	556,000	83,000	578,000
CIM Management Entities | Construction Management Fees
Related Party Transaction [Line Items]
Related party, amount of transaction						107,000	69,000	277,000	169,000
CIM Management Entities And Related Parties
Related Party Transaction [Line Items]
Due from related parties						126,000		126,000
Due to related parties												97,000
CIM Service Provider, LLC | Base Service Fee
Related Party Transaction [Line Items]
Related party, amount of transaction						0	276,000	282,000	552,000
Related party, fees payable per year under agreement																$ 1,000,000
CIM Service Provider, LLC | Master Services Agreement
Related Party Transaction [Line Items]
Due to related parties						2,198,000		2,198,000				1,673,000
Related party, compensation expensed for performing other services						615,000	542,000	1,427,000	1,189,000
CIM SBA Staffing, LLC | Personnel Fees
Related Party Transaction [Line Items]
Due to related parties						1,660,000		1,660,000				1,029,000
Related party, deferred personnel costs						6,000	44,000	37,000	50,000
CIM SBA Staffing, LLC | Expenses Related to Lending Segment Subject to Reimbursement
Related Party Transaction [Line Items]
Related party, amount of transaction						998,000	551,000	1,680,000	1,188,000
CIM Management Entities Affiliate
Related Party Transaction [Line Items]
Lease renewal term with related party															5 years
Rental and other property income from related party						29,000	28,000	58,000	55,000
CIM Group | Eleven Year Lease
Related Party Transaction [Line Items]
Rental and other property income from related party						370,000	206,000	740,000	206,000
Lease, term of contract with related party														11 years
Net rentable area with related party (in sq ft) | ft²													30	32
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%
CIM Capital, LLC | Affiliated Entity | Investment Management Agreement | Common Stock
Related Party Transaction [Line Items]
Related party, shares issued (in shares) | shares											203,349
CIM Service Provider, LLC | Affiliated Entity | Master Services Agreement, Amendment, Quarterly Incentive Fee
Related Party Transaction [Line Items]
Related party transaction, rate	15.00%
CIM Service Provider, LLC | Affiliated Entity | Master Services Agreement, Amendment, Quarterly Incentive Fee, Threshold For Eligibility, Per Quarter
Related Party Transaction [Line Items]
Related party transaction, rate	1.75%
CIM Service Provider, LLC | Affiliated Entity | Master Services Agreement, Amendment, Quarterly Incentive Fee, Threshold For Eligibility, Annualized
Related Party Transaction [Line Items]
Related party transaction, rate	7.00%
CCO Capital, LLC | Wholesaling Agreement
Related Party Transaction [Line Items]
Due to related parties						386,000		386,000				169,000
Related party, deferred costs						1,112,000		1,112,000				621,000
CCO Capital, LLC | Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Upfront Dealer Manager Fee
Related Party Transaction [Line Items]
Related party transaction, rate			1.25%
CCO Capital, LLC | Affiliated Entity | Second Amended and Restated Dealer Manager Agreement, Selling Commissions Payable
Related Party Transaction [Line Items]
Related party transaction, rate			5.50%
CCO Capital, LLC | Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Trailing Dealer Manager Fee, Daily Accruing Rate Of Annual Rate
Related Party Transaction [Line Items]
Related party transaction, rate			0.27%
CCO Capital, LLC | Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Trailing Dealer Manager Fee, Annual
Related Party Transaction [Line Items]
Related party transaction, rate			0.25%
CCO Capital, LLC | Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Amendment No. 1
Related Party Transaction [Line Items]
Due to related parties						249,000		249,000				$ 0
CCO Capital, LLC | Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Amendment No. 1 | Series A Preferred Stock
Related Party Transaction [Line Items]
Related party, stock issuance costs						349,000	313,000	585,000	523,000
CCO Capital, LLC | Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Amendment No. 1 | Series D Preferred Stock
Related Party Transaction [Line Items]
Related party, stock issuance costs						1,000		4,000
CCO Capital, LLC | Affiliated Entity | Second Amended and Restated Dealer Manager Agreement, Amendment No. 1, Selling Commissions Payable
Related Party Transaction [Line Items]
Related party transaction, rate		7.00%
CCO Capital, LLC | Affiliated Entity | Second Amended And Restated Dealer Manager Agreement, Non-Issuance Specific Costs Incurred by Related Party
Related Party Transaction [Line Items]
Related party, amount of transaction						$ 21,000	$ 5,000	$ 45,000	$ 7,000
Subsequent Event | CIM Capital, LLC | Affiliated Entity | Investment Management Agreement | Series A Preferred Stock
Related Party Transaction [Line Items]
Related party, shares issued (in shares) | shares										95,245
Related party, shares issued, percentage of outstanding shares										1.80%
Subsequent Event | CIM Service Provider, LLC | Affiliated Entity | Master Services Agreement | Series A Preferred Stock
Related Party Transaction [Line Items]
Related party, shares issued (in shares) | shares										11,273
Related party, shares issued, percentage of outstanding shares										0.20%