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Segment Information - Summary of Reportable Segment Information (Detail) - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Segment Reporting Information [Line Items]      
Net revenue $ 48,212,040 $ 57,650,426  
Operating expenses 42,967,871 50,900,477  
Corporate expenses 3,905,289 4,513,092  
Other operating expenses 1,100,000    
Depreciation and amortization 2,951,901 2,576,475  
Gain on dispositions (191,988) 0  
Operating loss (2,521,033) (7,144,030)  
Capital expenditures 1,029,268 $ 3,443,430  
Property and equipment, net 52,403,620   $ 53,667,550
FCC licenses 508,413,913   508,558,355
Goodwill 28,596,547   28,596,547
Other intangibles, net 25,048,873   $ 25,859,192
Audio [Member]      
Segment Reporting Information [Line Items]      
Net revenue 41,729,602    
Operating expenses 34,735,469    
Corporate expenses 0    
Other operating expenses 500,000    
Depreciation and amortization 2,004,377    
Gain on dispositions (191,988)    
Operating loss 4,681,744    
Capital expenditures 712,945    
Property and equipment, net 47,515,545    
FCC licenses 508,413,913    
Goodwill 25,377,447    
Other intangibles, net 2,082,130    
Digital [Member]      
Segment Reporting Information [Line Items]      
Net revenue 5,763,728    
Operating expenses 7,257,915    
Corporate expenses 0    
Other operating expenses 0    
Depreciation and amortization 0    
Gain on dispositions 0    
Operating loss (1,494,187)    
Capital expenditures 0    
Property and equipment, net 0    
FCC licenses 0    
Goodwill 0    
Other intangibles, net 0    
Other [Member]      
Segment Reporting Information [Line Items]      
Net revenue 718,710    
Operating expenses 974,487    
Corporate expenses 0    
Other operating expenses 0    
Depreciation and amortization 811,903    
Gain on dispositions 0    
Operating loss (1,067,680)    
Capital expenditures 2,852    
Property and equipment, net 24,041    
FCC licenses 0    
Goodwill 3,219,100    
Other intangibles, net 22,787,080    
Corporate [Member]      
Segment Reporting Information [Line Items]      
Net revenue 0    
Operating expenses 0    
Corporate expenses 3,905,289    
Other operating expenses 600,000    
Depreciation and amortization 135,621    
Gain on dispositions 0    
Operating loss (4,640,910)    
Capital expenditures 313,471    
Property and equipment, net 4,864,034    
FCC licenses 0    
Goodwill 0    
Other intangibles, net $ 179,663