Summary of Significant Accounting Policies (Narrative) (Details)	6 Months Ended
	Jun. 30, 2025 USD ($) item segment	Dec. 31, 2024 USD ($)
Summary of Significant Accounting Policies
Number of market serving	28
Number of FM radio stations	82
Number of AM radio stations	31
Number of metro signals	79
Securities at amortized cost | $	$ 9,100,000	$ 8,900,000
Securities at fair value | $	9,100,000	8,900,000
Allowance for credit losses | $	$ 1,099,000	$ 1,071,000
Number of Radio Markets	28
Number of operating segments | segment	1
Number of reportable segments | segment	1