Summary of Significant Accounting Policies (Details)	12 Months Ended
	Dec. 31, 2025 USD ($) item segment $ / shares shares	Dec. 31, 2024 USD ($) item $ / shares shares	Mar. 31, 2013 USD ($)
Summary of Significant Accounting Policies
Number of FM radio stations	82
Number of AM radio stations	30
Number of metro signals | item	79
Number of market serving | item	28
Time deposits	$ 0	$ 0
Securities at amortized cost	9,300,000	8,900,000
Securities at fair value	$ 9,300,000	8,900,000
Number of broadcast licenses | item	112
Weighted-average period of FCC license	3 years 1 month 6 days
Write-off of debt issuance costs	$ 45,000	36,000
Net book value of deferred costs	$ 49,000	$ 94,000
Treasury stock shares acquired | shares	219,326	21,865
Treasury stock acquired, average cost per share | $ / shares	$ 11.55	$ 13.28
Number of operating segments | segment	1
Number of reportable segments | segment	1
Continuing Operations
Summary of Significant Accounting Policies
Advertising and promotion costs	$ 1,411,000	$ 1,848,000
Class A Common Stock
Summary of Significant Accounting Policies
Stock repurchase program, remaining authorization amount	$ 15,200,000
Customer relationships
Summary of Significant Accounting Policies
Useful life	3 years
Minimum | Class A Common Stock
Summary of Significant Accounting Policies
Share repurchase program, authorized amount			$ 60,000,000
Minimum | Favorable lease agreements
Summary of Significant Accounting Policies
Useful life	1 year
Minimum | Other intangibles
Summary of Significant Accounting Policies
Useful life	1 year
Maximum | Class A Common Stock
Summary of Significant Accounting Policies
Share repurchase program, authorized amount			$ 75,800,000
Maximum | Favorable lease agreements
Summary of Significant Accounting Policies
Useful life	26 years
Maximum | Other intangibles
Summary of Significant Accounting Policies
Useful life	15 years
Revenue benchmark | Revenue from rights concentration risk
Summary of Significant Accounting Policies
Number of markets | item	5	5
Top five markets | Revenue benchmark | Revenue from rights concentration risk
Summary of Significant Accounting Policies
Concentration risk, market risk	34.00%	36.00%