Broadcast Licenses, Goodwill and Other Intangible Assets (Narrative) (Details)	3 Months Ended	12 Months Ended
Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2024 USD ($) item	Dec. 31, 2023 USD ($)
Broadcast Licenses, Goodwill and Other Intangible Assets
Number of reporting units \| item			1
Impairment of intangible assets	$ 0			$ 0
Amortization Expense			$ 270,000	$ 42,000
2025	389,000		389,000
2026	388,000		388,000
2027	133,000		133,000
2028	31,000		31,000
2029	$ 26,000		26,000
Goodwill, impairment loss		$ 0	$ 0

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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