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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2019
Summary Of Significant Accounting Policies [Line Items]      
Renewable terms of FCC broadcasting licenses 8 years    
Weighted-average period before the next renewal of the Company's FCC broadcasting licenses 4 years 4 months 24 days    
Operating Lease, Liability $ 36,711,218    
Operating Lease, Right-of-Use Asset 34,419,663 $ 39,768,910  
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Retained Earnings $ 143,304,213 $ 162,350,145  
OutlawsXP Inc [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Equity method investment, ownership percentage 90.00%    
Renegades Holdings, Inc. [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Equity method investment, ownership percentage 51.00%    
Accounting Standards Update 2016-02 [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Operating Lease, Liability     $ 43,100,000
Operating Lease, Right-of-Use Asset     38,800,000
Accounting Standards Update 2016-02 [Member] | Revision of Prior Period, Adjustment [Member]      
Summary Of Significant Accounting Policies [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Retained Earnings     $ 900,000
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] | Boston, MA, Philadelphia, PA and Tampa-Saint Petersburg, FL [Member]      
Summary Of Significant Accounting Policies [Line Items]      
Radio stations contributed to net revenue 66.30% 60.70%