Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Nov. 01, 2020
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2020
Document Transition Report	false
Entity File Number	0-25045
Entity Registrant Name	CF BANKSHARES INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	34-1877137
Entity Address, Address Line One	7000 North High St.
Entity Address, City or Town	Worthington
Entity Address, State or Province	OH
Entity Address, Postal Zip Code	43085
City Area Code	614
Local Phone Number	334-7979
Title of 12(b) Security	Common Stock, $.01 par value
Trading Symbol	cfbk
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001070680
Amendment Flag	false
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Common Stock [Member]
Entity Common Stock, Shares Outstanding		5,305,056
Non-Voting Common Stock [Member]
Entity Common Stock, Shares Outstanding		1,260,700