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FCC Licenses - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
FCC Licenses [Line Items] |  |  |
Impairment losses |  | $ 8,970,812 | $ 12,361,988
Proceeds from sale of assets |  | 4,631,566 | 26,349,462
Land [Member] | Disposal Group, Held-for-sale, Not Discontinued Operations [Member] |  |  |
FCC Licenses [Line Items] |  |  |
Impairment losses |  | 2,200,000 |
Proceeds from sale of assets |  | $ 4,650,000 |
Atlanta GA and Wet Palm Beach [Member] | Licensing Agreements [Member] |  |  |
FCC Licenses [Line Items] |  |  |
Impairment losses | $ 6,800,000 |  | $ 12,400,000

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- Definition 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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585 + Details
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