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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
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 4 months 24 days |
Advertising agency commissions of gross revenue | 15.00% |
Barter sales revenue from Broadcasting Service | $ 3,700,000 | $ 3,700,000
Barter sales expenses from Broadcasting Service | 4,000,000 | 3,900,000
Unamortized debt issuance expense | $ 1,804,390 | 1,555,992
Restatement Adjustment [Member] | Adjustments for New Accounting Principle, Early Adoption [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Deferred tax assets current, reclassified |  | 200,000
Other Assets [Member] | Restatement Adjustment [Member] | Adjustments for New Accounting Principle, Early Adoption [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Unamortized debt issuance expense |  | 1,600,000
Geographic Concentration Risk [Member] | Sales Revenue, Net [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Radio stations contributed to net revenue | 49.70% |
Quu, Inc. [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Carrying value of the investment in Quu, Inc. | $ 900,000 | $ 900,000

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