Summary of Significant Accounting Policies (Narrative) (Details) |
3 Months Ended | 9 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2021
USD ($)
item
shares
|
Sep. 30, 2020
shares
|
Sep. 30, 2021
USD ($)
item
segment
shares
|
Sep. 30, 2020
shares
|
Dec. 31, 2020
USD ($)
|
|
Summary Of Significant Accounting Policies [Line Items] | |||||
Number Of FM Radio Stations | item | 79 | ||||
Number Of AM Radio Stations | 34 | ||||
Number Of Metro Signals | 79 | ||||
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | 0 | 0 | 0 | 0 | |
Number of reportable segments | segment | 1 | ||||
Number Of Market Serving | item | 27 | 27 | |||
Operating Lease, Right-of-Use Asset | $ | $ 5,500,000 | $ 5,500,000 | $ 6,600,000 | ||
Number of operating segments | segment | 1 | ||||
Operating Lease, Liability | $ | 5,841,000 | $ 5,841,000 | 6,900,000 | ||
Allowance for doubtful accounts receivable | $ | $ 385,000 | $ 385,000 | $ 648,000 | ||
Number of Radio Markets | item | 27 | ||||
Customer relationships [Member] | |||||
Summary Of Significant Accounting Policies [Line Items] | |||||
Finite-Lived Intangible Asset, Useful Life | 3 years |