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Broadcast Licenses, Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]            
Goodwill, impairment loss $ 0          
Impairment of intangible assets, broadcast licenses $ 1,392,000 $ 3,757,000   $ 5,149,000 $ 0 $ 0
Amortization Expense       813,000 $ 1,029,000 $ 1,094,000
2021       387,000    
2022       39,000    
2023       35,000    
2024       33,000    
2025       $ 33,000    
Maximum [Member]            
Finite-Lived Intangible Assets [Line Items]            
Increase (decrease) in revenues       21.40%    
Maximum [Member] | Forecast            
Finite-Lived Intangible Assets [Line Items]            
Increase (decrease) in revenues     10.70%      
Minimum [Member]            
Finite-Lived Intangible Assets [Line Items]            
Increase (decrease) in revenues       10.40%    
Minimum [Member] | Forecast            
Finite-Lived Intangible Assets [Line Items]            
Increase (decrease) in revenues     7.60%