| Document and Entity Information | Feb. 08, 2022 |
| Cover [Abstract] | |
| Entity Registrant Name | BEASLEY BROADCAST GROUP INC |
| Entity Incorporation State Country Code | DE |
| Amendment Flag | false |
| Entity Central Index Key | 0001099160 |
| Document Type | 8-K |
| Document Period End Date | Feb. 8, 2022 |
| Entity File Number | 000-29253 |
| Entity Tax Identification Number | 65-0960915 |
| Entity Address, Address Line One | 3033 Riviera Drive |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | Naples |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 34103 |
| City Area Code | (239) |
| Local Phone Number | 263-5000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Class A Common Stock, par value $0.001 per share |
| Trading Symbol | BBGI |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
