Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2021	Mar. 31, 2022	Jun. 30, 2021
Entity Listings [Line Items]
Document Type	10-K/A
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	001-39043
Entity Registrant Name	BROADWAY FINANCIAL CORPORATION
Entity Central Index Key	0001001171
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-4547287
Entity Address, Address Line One	4601 Wilshire Boulevard
Entity Address, Address Line Two	Suite 150
Entity Address, City or Town	Los Angeles
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	90010
City Area Code	323
Local Phone Number	634-1700
Title of 12(b) Security	Common Stock, par value $0.01 per share (including attached preferred stock purchase rights)
Trading Symbol	BYFC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
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
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 54,555,000
Auditor Name	Moss Adams LLP
Auditor Location	Sacramento, California
Auditor Firm ID	659
Class A Voting Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		45,788,946
Class B Voting Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		11,404,618
Class C Voting Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		15,768,172