Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Mar. 12, 2020	Jun. 30, 2019
Document and Entity Information
Entity Registrant Name	CIM Commercial Trust Corp
Entity Central Index Key	0000908311
Document Type	10-K
Document Period End Date	Dec. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Interactive Data Current	Yes
Entity Public Float			$ 81.4
Entity Common Stock, Shares Outstanding		14,602,149
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY