v3.8.0.1
Document And Entity Information - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Mar. 05, 2018
Jun. 30, 2017
Document Information [Line Items]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Dec. 31, 2017    
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Entity Registrant Name URBAN ONE, INC.    
Entity Central Index Key 0001041657    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Smaller Reporting Accelerated Filer    
Entity Public Float     $ 63.1
Trading Symbol UONE    
Common Class A [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   1,641,632  
Common Class B [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   2,861,843  
Common Class C [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   2,928,906  
Common Class D [Member]      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   41,357,779