Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Mar. 04, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K/A
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Dec. 31, 2021
Entity File Number	0-25969
Entity Registrant Name	URBAN ONE, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	52-1166660
Entity Address, Address Line One	1010 Wayne Avenue
Entity Address, Address Line Two	14th Floor
Entity Address, City or Town	Silver Spring
Entity Address, State or Province	MD
City Area Code	(301)
Local Phone Number	429-3200
Entity Address, Postal Zip Code	20910
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 152.0
Entity Voluntary Filers	No
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
Auditor Name	BDO USA, LLP
Auditor Firm ID	243
Auditor Location	Potomac, Maryland
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001041657
Current Fiscal Year End Date	--12-31
Title of 12(b) Security	None
Trading Symbol	UONE
ICFR Auditor Attestation Flag	true
Common Stock Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		9,104,916
Title of 12(g) Security	Class A Common Stock, $0.001 Par Value
Trading Symbol	UONE
Security Exchange Name	NASDAQ
Common Stock Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,861,843
Common Stock Class C
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		2,045,016
Common Stock Class D
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		37,328,975
Title of 12(g) Security	Class D Common Stock, $0.001 Par Value
Trading Symbol	UONEK
Security Exchange Name	NASDAQ