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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) Automatic-Renewal | Dec. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) Segment | Dec. 31, 2020 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Renewable terms of FCC broadcasting licenses | 8 years |  |  |  |
Weighted-average period before the next renewal of the Company's FCC broadcasting licenses | 4 years 2 months 12 days |  |  |  |
Number of operating segments | Segment |  |  |  | 3 |
Number of reportable segments |  | 2 |  | 2 |
Quu Inc [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Investment carrying amount | $ | $ 2.0 | $ 2.0 | $ 2.0 | $ 2.0 | $ 2.1
OutlawsXP Inc [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Equity method investment, ownership percentage | 90.00% | 90.00% | 90.00% | 90.00% |
Renegades Holdings, Inc. [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Equity method investment, ownership percentage | 51.00% | 51.00% | 51.00% | 51.00% |
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] | Boston, MA, Philadelphia, PA and Tampa-Saint Petersburg, FL [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Radio stations contributed to net revenue |  |  |  |  | 66.30%
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] | Boston MA Detroit MI And Philadelphia PA [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Radio stations contributed to net revenue |  |  | 59.20% |  |

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