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Long-Term Debt - Additional Information (Detail) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) Radio_Stations | Dec. 31, 2014 USD ($)
Line of Credit Facility [Line Items] |  |  |
Revolving credit loan and term loan carried interest |  |  | 3.40%
Loss on modification of long-term debt |  | $ (558,856) | $ (30,569)
Mandatory prepayments of consolidated excess cash flow due period |  | 120 days |
Mandatory prepayments of consolidated excess cash flow required by credit agreement |  | The credit agreement requires mandatory prepayments equal to 50% of consolidated excess cash flow, as defined in the credit agreement, when the Company’s consolidated total debt is equal to or greater than three times its consolidated operating cash flow, as defined in the credit agreement. Prepayments of excess cash flows are not required when the Company’s consolidated total debt is less than three times its consolidated operating cash flow. Mandatory prepayments of consolidated excess cash flow are due 120 days after year end. The credit agreement also requires mandatory prepayments for defined amounts from net proceeds of asset sales, net insurance proceeds, and net proceeds of debt issuances. |
First Mortgage [Member] | Minimum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Interest Coverage Ratio |  | 200.00% |
Broadcast Equipment [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Number of radio towers leased for radio stations under separate lease agreements | Radio_Stations |  | 2 |
Term Loan [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term debt | $ 89,000,000 | $ 89,000,000 | 97,693,750
Revolving Credit Loan [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Revolving credit facility maximum commitment | 20,000,000 | 20,000,000 | $ 20,000,000
Remaining commitments under the revolving credit loan facility | 20,000,000 | $ 20,000,000 |
Revolving credit facility, Interest Rate Description |  | The credit facility may bear interest at either (i) the LIBOR rate, as defined in the credit agreement, plus a margin ranging from 2.5% to 4.5% that is determined by the Company's consolidated total debt ratio, as defined |
Fiscal Quarter Through September 30, 2016 [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term Debt Covenants Aggregate Leverage Ratio |  | 4.5 |
October 1, 2016 Through March 31, 2017 [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term Debt Covenants Aggregate Leverage Ratio |  | 4.25 |
April 1, 2017 Through December 31, 2017 [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term Debt Covenants Aggregate Leverage Ratio |  | 4.0 |
January 1, 2018 Through December 31, 2018 [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term Debt Covenants Aggregate Leverage Ratio |  | 3.75 |
January 1, 2019 Through December 31, 2019 [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term Debt Covenants Aggregate Leverage Ratio |  | 3.5 |
January 1, 2020 Through December 31, 2020 [Member] | First Mortgage [Member] | Maximum [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term Debt Covenants Aggregate Leverage Ratio |  | 3.0 |
Credit Facility [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Long-term debt | $ 89,000,000 | $ 89,000,000 |
Revolving credit loan and term loan carried interest | 3.90% | 3.90% |
Loss on modification of long-term debt | $ (600,000) |  |
Revolving credit facility and term loan maturity date |  | Nov. 30, 2020 |
Mandatory prepayments of excess cash flow | 50.00% | 50.00% |
Credit Facility [Member] | Revolving Credit Loan [Member] | Minimum [Member] | LIBOR [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Credit facility interest rate margins |  | 2.50% |
Credit Facility [Member] | Revolving Credit Loan [Member] | Minimum [Member] | Base Rate [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Credit facility interest rate margins |  | 1.50% |
Credit Facility [Member] | Revolving Credit Loan [Member] | Maximum [Member] | LIBOR [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Credit facility interest rate margins |  | 4.50% |
Credit Facility [Member] | Revolving Credit Loan [Member] | Maximum [Member] | Base Rate [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Credit facility interest rate margins |  | 3.50% |
Credit Facility [Member] | Revolving Credit Loan and Term Loan [Member] |  |  |
Line of Credit Facility [Line Items] |  |  |
Revolving credit facility and term loan maturity date |  | Nov. 30, 2020 |

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