Cover Page - shares	3 Months Ended
	Mar. 31, 2021	May 06, 2021
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	1-13610
Entity Registrant Name	CIM COMMERCIAL TRUST CORPORATION
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	75-6446078
Entity Address, Address Line One	17950 Preston Road,
Entity Address, Address Line Two	Suite 600,
Entity Address, City or Town	Dallas,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75252
City Area Code	(972)
Local Phone Number	349-3200
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		14,847,742
Entity Central Index Key	0000908311
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Common Stock, $0.001 Par Value | Nasdaq Global Market
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.001 Par Value
Trading Symbol	CMCT
Security Exchange Name	NASDAQ
Common Stock, $0.001 Par Value | Tel Aviv Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Common Stock, $0.001 Par Value
Trading Symbol	CMCT-L
Series L Preferred Stock, $0.001 Par Value | Nasdaq Global Market
Entity Information [Line Items]
Title of 12(b) Security	Series L Preferred Stock, $0.001 Par Value
Trading Symbol	CMCTP
Security Exchange Name	NASDAQ
Series L Preferred Stock, $0.001 Par Value | Tel Aviv Stock Exchange
Entity Information [Line Items]
Title of 12(b) Security	Series L Preferred Stock, $0.001 Par Value
Trading Symbol	CMCTP