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Related Party Transactions - Additional Information (Detail) |  |  |  |  |  |  |  |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 28, 2019 USD ($) | Jun. 18, 2018 USD ($) | Feb. 22, 2017 USD ($) | May 03, 2016 USD ($) | Nov. 17, 2015 Automatic-Renewal | Apr. 04, 2014 USD ($) | Apr. 10, 2013 USD ($) | Jul. 31, 2012 USD ($) | Feb. 14, 2012 USD ($) | Mar. 25, 2011 USD ($) shares | Dec. 31, 2020 USD ($) Radio-Stations Tower | Dec. 31, 2019 USD ($) | Oct. 16, 2015 USD ($) | Apr. 03, 2015
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of tower |  |  |  |  |  |  |  |  |  |  | $ 4,631,566 | $ 26,349,462 |  |
Percentage of outstanding units ownership interest in Investee |  |  |  |  |  | 20.00% | 20.00% |  |  |  |  |  |  | 20.00%
Impairment losses |  |  |  |  |  |  |  |  |  |  | 8,970,812 | 13,657,941 |  |
Payment in Kind (PIK) Note [Member] | Board of Directors Chairman [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face value |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 |  |  |
Long term debt stated interest rate |  |  |  |  |  |  |  |  |  |  | 6.00% |  |  |
Long term debt maturity |  |  |  |  |  |  |  |  |  |  | December 2023 |  |  |
Augusta GA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of tower | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Beasley Broadcasting Management, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 200,000 | 200,000 |  |
Beasley Family Towers Inc [Member] | April 30, 2021 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 0 | 0 |  |
Lease agreement expiration date |  |  |  |  |  |  |  |  |  |  | Apr. 30, 2021 |  |  |
Number of radio towers sold to unrelated party | Automatic-Renewal |  |  |  |  | 2 |  |  |  |  |  |  |  |  |
Repayment of prepaid rent to related party |  |  |  |  |  |  |  |  |  |  | $ 100,000 |  |  |
Beasley Family Towers Inc [Member] | April 30, 2021 [Member] | Prepaid Rent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepaid expense paid by related party |  |  |  |  |  |  |  |  |  |  |  | 100,000 |  |
Beasley Family Towers Inc [Member] | December 28, 2020 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 400,000 | 400,000 |  |
Number of radio stations for which radio tower leased | Radio-Stations |  |  |  |  |  |  |  |  |  |  | 19 |  |  |
Lease agreement expiration date |  |  |  |  |  |  |  |  |  |  | Dec. 28, 2020 |  |  |
Beasley Family Towers Inc [Member] | Lease Agreements Three [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 100,000 | 200,000 |  |
Number of radio towers sold for radio station | Tower |  |  |  |  |  |  |  |  |  |  | 1 |  |  |
Lease agreement expiration date |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2038 |  |  |
GGB Augusta, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 41,000 | 44,000 |  |
Lease agreement expiration date |  |  |  |  |  |  |  |  |  |  | Nov. 01, 2023 |  |  |
GGB Estero, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 200,000 | 200,000 |  |
Lease agreement expiration date |  |  |  |  |  |  |  |  |  |  | Aug. 31, 2024 |  |  |
GGB Las Vegas, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 200,000 | 200,000 |  |
Lease agreement expiration date |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2023 |  |  |
LN2 DB, LLC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional contribution to related party |  | $ 150,000 | $ 150,000 | $ 166,667 |  | $ 104,167 | $ 104,167 | $ 104,167 | $ 62,500 | $ 250,000 |  |  |  |
Related party stock purchase | shares |  |  |  |  |  |  |  |  |  | 25,000 |  |  |  |
Percentage of outstanding units ownership interest in Investee |  |  |  | 20.00% |  |  |  | 20.00% |  | 20.00% |  |  |  |
Note bearing interest rate |  |  | 18.00% |  |  |  |  |  |  |  |  |  |  |
Conversion of note receivable and accrued interest to equity investment |  | $ 187,618 |  |  |  |  |  |  |  |  |  |  |  |
Impairment losses |  |  |  |  |  |  |  |  |  |  |  | 1,300,000 |  |
Wintersrun Communications Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 100,000 | 100,000 |  |
Number of radio stations for which radio tower leased | Radio-Stations |  |  |  |  |  |  |  |  |  |  | 1 |  |  |
Wintersrun Communications Inc | Prepaid Rent [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepaid expense paid by related party |  |  |  |  |  |  |  |  |  |  |  |  | $ 300,000 |
Wintersrun Communications Inc | Augusta GA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  | $ 31,000 |  |  |
Lease agreement expiration date |  |  |  |  |  |  |  |  |  |  | Oct. 16, 2025 |  |  |
Wintersrun Communications Inc | Charlotte, NC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of radio towers sold for radio station | Tower |  |  |  |  |  |  |  |  |  |  | 1 |  |  |
Wintersrun Communications, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement expiration date |  |  |  |  |  |  |  |  |  |  | Dec. 31, 2025 |  |  |
Wintersrun Communications, LLC | Augusta GA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease or rental expense |  |  |  |  |  |  |  |  |  |  |  | $ 31,000 |  |
Wintersrun Communications, LLC | Charlotte, NC [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of tower |  |  |  |  |  |  |  |  |  |  | $ 400,000 |  |  |
Mr Beasley And Ggb Family Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument face value |  |  |  |  |  |  |  |  |  |  | $ 5,000,000 |  |  |

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