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Related Party Transactions - Additional Information (Detail)
12 Months Ended
Mar. 28, 2019
USD ($)
Jun. 18, 2018
USD ($)
Feb. 22, 2017
USD ($)
May 03, 2016
USD ($)
Nov. 17, 2015
Automatic-Renewal
Apr. 04, 2014
USD ($)
Apr. 10, 2013
USD ($)
Jul. 31, 2012
USD ($)
Feb. 14, 2012
USD ($)
Mar. 25, 2011
USD ($)
shares
Dec. 31, 2020
USD ($)
Radio-Stations
Tower
Dec. 31, 2019
USD ($)
Oct. 16, 2015
USD ($)
Apr. 03, 2015
Related Party Transaction [Line Items]                            
Proceeds from sale of tower                     $ 4,631,566 $ 26,349,462    
Percentage of outstanding units ownership interest in Investee           20.00% 20.00%             20.00%
Impairment losses                     8,970,812 13,657,941    
Payment in Kind (PIK) Note [Member] | Board of Directors Chairman [Member]                            
Related Party Transaction [Line Items]                            
Debt instrument face value                     $ 5,000,000      
Long term debt stated interest rate                     6.00%      
Long term debt maturity                     December 2023      
Augusta GA [Member]                            
Related Party Transaction [Line Items]                            
Proceeds from sale of tower $ 500,000                          
Beasley Broadcasting Management, LLC [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 200,000 200,000    
Beasley Family Towers Inc [Member] | April 30, 2021 [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 0 0    
Lease agreement expiration date                     Apr. 30, 2021      
Number of radio towers sold to unrelated party | Automatic-Renewal         2                  
Repayment of prepaid rent to related party                     $ 100,000      
Beasley Family Towers Inc [Member] | April 30, 2021 [Member] | Prepaid Rent [Member]                            
Related Party Transaction [Line Items]                            
Prepaid expense paid by related party                       100,000    
Beasley Family Towers Inc [Member] | December 28, 2020 [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 400,000 400,000    
Number of radio stations for which radio tower leased | Radio-Stations                     19      
Lease agreement expiration date                     Dec. 28, 2020      
Beasley Family Towers Inc [Member] | Lease Agreements Three [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 100,000 200,000    
Number of radio towers sold for radio station | Tower                     1      
Lease agreement expiration date                     Dec. 31, 2038      
GGB Augusta, LLC [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 41,000 44,000    
Lease agreement expiration date                     Nov. 01, 2023      
GGB Estero, LLC [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 200,000 200,000    
Lease agreement expiration date                     Aug. 31, 2024      
GGB Las Vegas, LLC [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 200,000 200,000    
Lease agreement expiration date                     Dec. 31, 2023      
LN2 DB, LLC [Member]                            
Related Party Transaction [Line Items]                            
Additional contribution to related party   $ 150,000 $ 150,000 $ 166,667   $ 104,167 $ 104,167 $ 104,167 $ 62,500 $ 250,000        
Related party stock purchase | shares                   25,000        
Percentage of outstanding units ownership interest in Investee       20.00%       20.00%   20.00%        
Note bearing interest rate     18.00%                      
Conversion of note receivable and accrued interest to equity investment   $ 187,618                        
Impairment losses                       1,300,000    
Wintersrun Communications Inc                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 100,000 100,000    
Number of radio stations for which radio tower leased | Radio-Stations                     1      
Wintersrun Communications Inc | Prepaid Rent [Member]                            
Related Party Transaction [Line Items]                            
Prepaid expense paid by related party                         $ 300,000  
Wintersrun Communications Inc | Augusta GA [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                     $ 31,000      
Lease agreement expiration date                     Oct. 16, 2025      
Wintersrun Communications Inc | Charlotte, NC [Member]                            
Related Party Transaction [Line Items]                            
Number of radio towers sold for radio station | Tower                     1      
Wintersrun Communications, LLC                            
Related Party Transaction [Line Items]                            
Lease agreement expiration date                     Dec. 31, 2025      
Wintersrun Communications, LLC | Augusta GA [Member]                            
Related Party Transaction [Line Items]                            
Lease or rental expense                       $ 31,000    
Wintersrun Communications, LLC | Charlotte, NC [Member]                            
Related Party Transaction [Line Items]                            
Proceeds from sale of tower                     $ 400,000      
Mr Beasley And Ggb Family Limited [Member]                            
Related Party Transaction [Line Items]                            
Debt instrument face value                     $ 5,000,000