ACQUISITIONS AND RECENT TRANSACTIONS (Details Textual)

v3.8.0.1

ACQUISITIONS AND RECENT TRANSACTIONS (Details Textual) - USD ($)								1 Months Ended																			12 Months Ended
	Aug. 09, 2017	Jul. 06, 2017	Jun. 08, 2017	Aug. 01, 2016	Jun. 10, 2016	Apr. 05, 2016	Mar. 08, 2016	Dec. 29, 2017	Nov. 22, 2017	Sep. 29, 2017	Sep. 15, 2017	Aug. 31, 2017	Jun. 30, 2017	May 30, 2017	May 19, 2017	Mar. 30, 2017	Feb. 28, 2017	Feb. 24, 2017	Jan. 30, 2017	Jan. 03, 2017	Dec. 30, 2016	Nov. 30, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Mar. 17, 2016	Dec. 31, 2017	Dec. 28, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 02, 2017	Mar. 15, 2017	Sep. 13, 2016	May 17, 2016
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Payments for Loans																			$ 2,000,000
Debt Instrument, Face Amount																											$ 255,000,000
Gains (Losses) on Extinguishment of Debt, Total															$ 600,000				4,500,000								(2,775,000)		$ (87,000)	$ (41,000)
Amortization of Financing Costs																	$ 18,000,000		12,000,000								940,000		$ 631,000	628,000
Dividends Payable, Date Declared						Mar. 10, 2016		Dec. 07, 2017		Sep. 12, 2017														Jun. 02, 2016
Common Stock, Dividends, Per Share, Declared						$ 0.0650		$ 0.0650		$ 0.0650			$ 0.0650			$ 0.0650							$ 0.0650	$ 0.0650					$ 0.0650
Payments of Ordinary Dividends, Common Stock						$ 1,700,000		$ 1,700,000		$ 1,700,000			$ 1,700,000			$ 1,700,000							$ 1,700,000	$ 1,600,000			6,790,000		$ 6,678,000	6,612,000
Dividends Payable, Date to be Paid						Apr. 05, 2016		Dec. 29, 2017		Sep. 29, 2017													Sep. 30, 2016	Jun. 30, 2016					Dec. 31, 2016
Dividends Payable, Date of Record						Mar. 22, 2016		Dec. 18, 2017		Sep. 22, 2017													Sep. 19, 2016	Jun. 16, 2016					Dec. 19, 2016
Business Combination, Consideration Transferred, Total																											4,043,000		$ 10,120,000
Goodwill																											26,424,000		25,613,000	24,563,000
Business Combination, Liabilities Arising from Contingencies, Amount Recognized																											$ 1,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents							$ 1,300,000																						1,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other							600,000
Payments to Acquire Intangible Assets																													$ 3,000
Proceeds from Sale of Land Held-for-use																							$ 700,000
Debt Instrument, Interest Rate, Stated Percentage																											4.58%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period																											211,658		0
Business Combination Recognized Identifiable Assets Increase or Decrease												$ 1,000,000															$ 100,000		$ 500,000
Proceeds from Collection of Lease Receivables													$ 600,000
Proceeds from Sale of Intangible Assets														$ 10,000
Gain (Loss) on Disposition of Intangible Assets														$ 56,000
Swingline Loans [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity															7,500,000
WQVN-AM [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Agreement to Sell Assets in Cash																															$ 3,500,000
Gain (Loss) on Disposition of Assets for Financial Service Operations																											4,700,000
WQVN AM Tower Site [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Proceeds from Sale of Property, Plant, and Equipment																												$ 1,900,000
Gain (Loss) on Disposition of Assets																												$ 400,000
Restricted Stock [Member] | Executive Officer [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	33,066
Restricted Stock [Member] | Management [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period																		178,592
Standby Letters of Credit [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity															5,000,000
Senior Secured Debt [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Debt Instrument, Face Amount															$ 255,000,000												$ 255,000,000
Debt Instrument Expiration Period															2024
Debt Instrument, Interest Rate, Stated Percentage															6.75%												7.08%
Assetbased Revoloving Credit Facility [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Debt Instrument, Face Amount															$ 30,000,000
Line of Credit Facility, Maximum Borrowing Capacity															4,500,000												$ 9,000,000
Word Broadcasting Network [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Proceeds from Sale of Other Assets																				$ 500,000
Nationa lPark Service [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Proceeds from Sale of Other Assets					$ 2,500,000
Gain (Loss) on Disposition of Other Assets					$ 1,900,000
King James Bible Mobile Applications [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total							4,000,000
Goodwill							200,000
Payments to Acquire Businesses, Gross							2,700,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents																																		$ 300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables							300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other							$ 200,000
Term B Loan [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Payments for Loans															258,000,000		3,000,000				$ 5,000,000	$ 1,000,000	2,300,000	$ 1,200,000	$ 800,000	$ 800,000
Debt Instrument, Face Amount																	300,000,000
Gains (Losses) on Extinguishment of Debt, Total															1,500,000		$ 6,200,000		$ 4,500		12,000	2,500	3,900	1,300		2,500
Amortization of Financing Costs																					$ 33,000,000	$ 6,900,000	14,000,000	3,400,000		$ 6,700,000
Early Repayments Of Debt Principal Payments																							$ 1,500,000	$ 400,000
Debt Instrument, Interest Rate, Stated Percentage																													4.78%
Line of Credit Facility, Maximum Borrowing Capacity																											300,000,000
Revolver [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Payments for Loans															4,100,000
Gains (Losses) on Extinguishment of Debt, Total															56,000,000,000
Amortization of Financing Costs																											26,000		$ 70,000	$ 68,000
Line of Credit Facility, Maximum Borrowing Capacity																											25,000,000
Long-term Line of Credit, Noncurrent															$ 25,000,000
Time Brokerage Agreement [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
License Fee Payable																											100,000
Domain names and mobile applications for Daily Bible Devotion [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total																													$ 3,000
FM Translator in Columbus, Ohio [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Jun. 20, 2016
Business Combination, Consideration Transferred, Total																													$ 300,000
FM Translator Aurora Florida Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Dec. 31, 2016
Business Combination, Consideration Transferred, Total																													$ 50,000
FM Translator Port St. Lucie Florida Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Dec. 31, 2016
Business Combination, Consideration Transferred, Total																													$ 50,000
FM Translator Rhinelander Wisconsin Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Dec. 14, 2016
Business Combination, Consideration Transferred, Total																													$ 50,000
FM Translator Little Fish Lake Valley California Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Dec. 08, 2016
Business Combination, Consideration Transferred, Total																													$ 44,000
FM Translator Lake Placid Florida Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Dec. 01, 2016
Business Combination, Consideration Transferred, Total																													$ 35,000
FM Translator construction permit Lahaina Hawaii and Kihei Hawaii Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total																													$ 110,000
FM Translator Crested Butte Colorado Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Nov. 22, 2016
Business Combination, Consideration Transferred, Total																													$ 39,000
FM Translator Dansville New York Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Nov. 21, 2016
Business Combination, Consideration Transferred, Total																													$ 75,000
FM Translator construction permit Kingsville Texas Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Nov. 11, 2016
Business Combination, Consideration Transferred, Total																													$ 50,000
FM Translator Sebring Florida Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Nov. 07, 2016
Business Combination, Consideration Transferred, Total																													$ 77,000
FM Translator Carbondale Pennsylvania Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Nov. 21, 2016
Business Combination, Consideration Transferred, Total																													$ 75,000
Radio Station KXFN-AM St. Louis Missouri [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Oct. 20, 2016
Business Combination, Consideration Transferred, Total																													$ 190,000
FM Translator construction permit Angola Indiana Cofax Indiana and Battle Creek Michigan Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Oct. 20, 2016
Business Combination, Consideration Transferred, Total																													$ 155,000
FM Translator construction permit Palm Coast Florida Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Oct. 19, 2016
Business Combination, Consideration Transferred, Total																													$ 65,000
FM Translator Lake City Florida Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Oct. 12, 2016
Business Combination, Consideration Transferred, Total																													$ 65,000
Fm Translator Amherst New York Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Jun. 10, 2016
Business Combination, Consideration Transferred, Total																													$ 60,000
Fm Translator Construction Permit Charlotte Michigan Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Jun. 08, 2016
Business Combination, Consideration Transferred, Total																													$ 50,000
Fm Translator Construction Permit Kerrville Texas Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													May 13, 2016
Business Combination, Consideration Transferred, Total																													$ 50,000
Fm Translator Construction Permit Atwood Kentucky Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Jun. 03, 2016
Business Combination, Consideration Transferred, Total																													$ 88,000
Fm Translator Lincoln Maine Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													May 02, 2016
Business Combination, Consideration Transferred, Total																													$ 100,000
Fm Translator Construction Permit Emporia Kansas Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Apr. 29, 2016
Business Combination, Consideration Transferred, Total																													$ 25,000
Christian Concert Alerts.com [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Dec. 01, 2016
Business Combination, Consideration Transferred, Total																													$ 150,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total																											200
Payments to Acquire Businesses, Gross																											100
Business Acquisition Installments Payable																											$ 50,000
History On The Net.com [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total																													100,000
Cycleprophetcom Business Acquisition [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total																													400,000
Goodwill																																	$ 7,200
Business Acquisition Purchase Price Allocation Deferred Revenue																																	100,000
Business Acquisition Contingent Earn Out Consideration Payable																																	$ 100,000
Estimated Contingent Earn-out Consideration																													$ 66,000
Retirement Watch Business Acquisition [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																													Apr. 01, 2016
Business Combination, Consideration Transferred, Total																													$ 100,000
Goodwill																													8,600
Business Acquisition Purchase Price Allocation Deferred Revenue																													$ 600,000
Hillcrest Media Group Inc [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total				$ 3,500,000
Goodwill				800,000
Payments to Acquire Businesses, Gross				3,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue				1,000,000
Business Combination, Consideration Transferred, Liabilities Incurred				$ 200,000
FM translator construction permit in Eaglemount, Washington Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																											Jul. 24, 2017
Business Combination, Consideration Transferred, Total																											$ 40,000
FM translator construction permit in Festus, Missouri Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																											Jun. 28, 2017
Business Combination, Consideration Transferred, Total																											$ 40,000
FM translator construction permit in Quartz Site, Arizona Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																											Mar. 14, 2017
Business Combination, Consideration Transferred, Total																											$ 20,000
FM translator construction permit in Roseburg, Oregon Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																											Mar. 01, 2017
Business Combination, Consideration Transferred, Total																											$ 45,000
FM translator in Astoria, Oregon Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																											Jan. 16, 2017
Business Combination, Consideration Transferred, Total																											$ 33,000
FM translator construction permit in Mohave Valley, Arizona Asset Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Acquisition, Effective Date of Acquisition																											Jan. 06, 2017
Business Combination, Consideration Transferred, Total																											$ 20,000
Radio Station WSPZ-AM [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total									$ 600,000		$ 1,500,000
Goodwill											$ 13,000
TeacherTube.com Website [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total												1,100,000
Intelligence Report Newsletter [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total												2,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities, Current												$ 2,900,000
TradersCrux.com Website [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total		$ 300,000
Estimated Contingent Earn-out Consideration		$ 100,000
Portuguese Bible mobile application Assets Purchase [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Consideration Transferred, Total			$ 65,000
Estimated Contingent Earn-out Consideration			$ 20,000
Prayers-For-Special-Help.com [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total																																$ 200,000