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Acquisitions and Dispositions - Schedule of Purchase Price Allocation (Detail) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Property and equipment	$ 432,588
FCC licenses	12,891,117	$ 13,155,601
Other intangibles	176,295
Net assets acquired	$ 13,500,000

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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