Acquisitions and Dispositions (Details Textual) - USD ($)	1 Months Ended
	Jan. 16, 2017	Mar. 31, 2017	Dec. 31, 2016	Dec. 02, 2016	Nov. 14, 2016	Nov. 08, 2016	Oct. 11, 2016	Sep. 12, 2016	Aug. 11, 2016	Jun. 03, 2016	Apr. 11, 2016	Apr. 08, 2016	Mar. 25, 2016	Mar. 16, 2016	Nov. 02, 2015
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total		$ 0	$ 14,243,000
FM Translator [Member] | Portland, Maine market [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles														$ 50,000
FM Translator [Member] | Milwaukee, Wisconsin Market [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles													$ 50,000
FM Station [Member] | Wilks Broadcast - Columbus, LLC [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total															$ 13,791,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables															734,000
Business Acquisition, Transaction Costs															$ 57,000
Tennessee Market [Member] | FM Translator Serving the Charlottesville [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles											$ 30,000
Iowa Market [Member] | FM Translator Serving the Spencer [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles										$ 35,000
Iowa Market [Member] | FM Translator Serving Des Moines [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles						$ 25,000
Virginia Market [Member]
Business Acquisition [Line Items]
Sale Leaseback Transaction, Net Proceeds, Investing Activities	$ 1,650,000
Virginia Market [Member] | FM Translator Serving the Charlottesville [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles												$ 100,000
Washington Market [Member] | FM Translator Serving the Bellingham [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles							$ 25,000		$ 50,000
Maine market [Member] | FM Translator Serving the Portland [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles								$ 45,000
Illinois Market [Member] | FM Translator Serving Springfield [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles					$ 23,000
New York Market [Member] | FM Translator Serving Ithaca [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles				$ 35,000