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Cover Page - shares
 9 Months Ended
Sep. 30, 2019
Oct. 31, 2019
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Registrant Name BEASLEY BROADCAST GROUP INC  
Security Exchange Name NASDAQ  
Entity Central Index Key 0001099160  
Title of 12(b) Security Common Stock  
Current Fiscal Year End Date --12-31  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes  
Entity Address, State or Province FL  
Trading Symbol BBGI  
Entity Shell Company false  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Class A Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   11,212,043
Class B Common Stock [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   16,662,743