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RELATED-PARTY TRANSACTIONS - Narrative (Details) ft² in Thousands |  |  |  |  |  | 3 Months Ended | 9 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
May 11, 2020 | Apr. 09, 2020 | Jan. 28, 2020 | Jan. 01, 2019 subsidiary | May 10, 2018 | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | 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 |  |  |  |  |  | $ 8,119,000 |  | $ 8,119,000 |  |  |  | $ 9,431,000 |  |  |  |
Wholesaling agreement, percent of selling price fee per share |  |  |  |  | 2.75% |  |  |  |  |  |  |  |  |  |  |
Related party, stock issuance costs |  |  |  |  |  |  |  | 683,000 | $ 497,000 |  |  |  |  |  |  |
CIM Urban REIT Management, L.P. | Asset Management Fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party, amount of transaction |  |  |  |  |  | 2,387,000 | $ 2,424,000 | 7,126,000 | 9,669,000 |  |  |  |  |  |  |
Due to related parties |  |  |  |  |  | 2,382,000 |  | 2,382,000 |  |  |  | 2,356,000 |  |  |  |
CIM Urban REIT Management, L.P. | Property Management Fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party, amount of transaction |  |  |  |  |  | 461,000 | 494,000 | 1,258,000 | 2,106,000 |  |  |  |  |  |  |
Affiliated Entity | Investment Management Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party, percent of common stock outstanding |  |  |  |  |  |  |  |  |  |  | 1.40% |  |  |  |  |
Affiliated Entity | Employment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due to related party |  |  |  |  |  | 287,000 |  | 287,000 |  |  |  |  |  |  |  |
CIM Management Entities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due to related parties |  |  |  |  |  | 1,532,000 |  | 1,532,000 |  |  |  | 4,107,000 |  |  |  |
CIM Management Entities | Personnel Fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party, amount of transaction |  |  |  |  |  | 867,000 | 837,000 | 2,451,000 | 3,873,000 |  |  |  |  |  |  |
CIM Management Entities | Lease Commission Fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party, amount of transaction |  |  |  |  |  | 18,000 | 32,000 | 101,000 | 610,000 |  |  |  |  |  |  |
CIM Management Entities | Construction Management Fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party, amount of transaction |  |  |  |  |  | 32,000 | 160,000 | 309,000 | 329,000 |  |  |  |  |  |  |
CIM Management Entities And Related Parties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due to related parties |  |  |  |  |  | 301,000 |  | 301,000 |  |  |  | 97,000 |  |  |  |
CIM Service Provider, LLC | Base Service Fee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party, amount of transaction |  |  |  |  |  | 0 | 275,000 | 282,000 | 827,000 |  |  |  |  |  |  |
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 |  |  |  |  |  | 739,000 |  | 739,000 |  |  |  | 1,673,000 |  |  |  |
Related party, compensation expensed for performing other services |  |  |  |  |  | 639,000 | 630,000 | 2,066,000 | 1,819,000 |  |  |  |  |  |  |
CIM SBA Staffing, LLC | Personnel Fees |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due to related parties |  |  |  |  |  | 2,274,000 |  | 2,274,000 |  |  |  | 1,029,000 |  |  |  |
Related party, deferred personnel costs |  |  |  |  |  | 81,000 | 38,000 | 118,000 | 82,000 |  |  |  |  |  |  |
CIM SBA Staffing, LLC | Expenses Related to Lending Segment Subject to Reimbursement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related party, amount of transaction |  |  |  |  |  | 901,000 | 652,000 | 2,581,000 | 1,840,000 |  |  |  |  |  |  |
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 | 87,000 | 83,000 |  |  |  |  |  |  |
CIM Group | Eleven Year Lease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rental and other property income from related party |  |  |  |  |  | 370,000 | 356,000 | 1,110,000 | 562,000 |  |  |  |  |  |  |
Lease, term of contract with related party |  |  |  |  |  |  |  |  |  |  |  |  |  | 11 years |  |
Net rentable area with related party (in sq ft) | ft² |  |  |  |  |  |  |  |  |  |  |  |  | 30 | 32 |  |
President | Employment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contractual obligation in connection with retirement of company president |  |  |  |  |  | 450,000 |  | 450,000 |  |  |  |  |  |  |  |
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 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% |  |  |  |  |  |
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% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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% |  |  |  |  |  |
CCO Capital, LLC | Wholesaling Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due to related parties |  |  |  |  |  | 444,000 |  | 444,000 |  |  |  | 169,000 |  |  |  |
Related party, deferred costs |  |  |  |  |  | 1,271,000 |  | 1,271,000 |  |  |  | 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 |  |  |  |  |  | 391,000 |  | 391,000 |  |  |  | $ 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 |  |  |  |  |  | 305,000 | 337,000 | 890,000 | 860,000 |  |  |  |  |  |  |
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 |  |  |  |  |  | 8,000 |  | 12,000 |  |  |  |  |  |  |  |
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 |  |  |  |  |  | $ 27,000 | $ 12,000 | $ 72,000 | $ 19,000 |  |  |  |  |  |  |

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