ACQUISITIONS AND RECENT TRANSACTIONS (Details Textual) - USD ($) | Aug. 09, 2017 | Jul. 06, 2017 | Jun. 08, 2017 | Mar. 14, 2017 | Mar. 01, 2017 | Jan. 06, 2017 | Sep. 15, 2017 | Aug. 31, 2017 | Jun. 30, 2017 | May 30, 2017 | May 19, 2017 | Mar. 31, 2017 | Mar. 24, 2017 | Feb. 28, 2017 | Jan. 30, 2017 | Jan. 16, 2017 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Jun. 30, 2017 | Jul. 24, 2017 | Jun. 28, 2017 | Mar. 15, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Apr. 01, 2015 |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Gains (Losses) on Extinguishment of Debt, Total | | | | | | | | | | | $ 600,000 | | | | | | $ 0 | $ (18,000) | $ (2,775,000) | $ (32,000) | | | | | | | |
Amortization of Financing Costs | | | | | | | | | | | | | | $ 18,000 | | | | | 645,000 | 475,000 | | | | | | | |
Dividends Payable, Date Declared | | | | | | | | | Sep. 12, 2017 | | | | | | | | | | | | | | | | | | |
Common Stock, Dividends, Per Share, Declared | | | | | | | | | $ 0.0650 | | | $ 0.0650 | | | | | $ 0.0650 | | | | | | | | | | |
Payments of Ordinary Dividends, Common Stock | | | | | | | | | $ 1,700,000 | | | $ 1,700,000 | | | | | $ 1,700,000 | | 5,089,000 | 5,000,000 | | | | | | | |
Dividends Payable, Date to be Paid | | | | | | | | | Sep. 29, 2017 | | | | | | | | | | | | | | | | | | |
Dividends Payable, Date of Record | | | | | | | | | Sep. 22, 2017 | | | | | | | | | | | | | | | | | | |
Business Combination, Consideration Transferred, Total | | | $ 65,000 | | | | | | | | | | | | | | | | 3,423,000 | | | | | | | | |
Goodwill | | | | | | | | | | | | | | | | | $ 26,436,000 | | 26,436,000 | | | | | | $ 25,613,000 | $ 24,563,000 | |
Proceeds from Sale of Intangible Assets | | | | | | | | | | $ 10,000 | | | | | | | | | $ 1,900,000 | | | | | | | | |
Gain (Loss) on Disposition of Intangible Assets | | | | | | | | | | $ 56,000 | | | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | | | | | | | | | 4.58% | | 4.58% | | | | | | | | |
Proceeds from Collection of Lease Receivables | | | | | | | | | | | | | | | | | | | | | $ 600,000 | | | | | | |
Business Combination Recognized Identifiable Assets Increase or Decrease | | | | | | | | | | | | | | | | | | | $ 100,000 | $ 300,000 | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period | | | | | | | | | | | | | | | | | | | 211,658 | | | | | | | | |
Proceeds of Escrow Deposit Under Agreement To Sell | | | | | | | | $ 1,000,000 | | | | | | | | | | | | | | | | | | | |
Restricted Stock [Member] | Executive [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 | | | | | | | | | | | | | | | | |
Debt Instrument, Interest Rate, Stated Percentage | | | | | | | | | | | 6.75% | | | | | | | | | | | | | | | | |
Debt Instrument expiration Period | | | | | | | | | | | 2,024 | | | | | | | | | | | | | | | | |
Asset-Based 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 | | | | | | $ 6,600,000 | | $ 6,600,000 | | | | | | | | |
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 | | | | | | | | | | | | | | | | |
Long-term Line of Credit, Noncurrent | | | | | | | | | | | 25,000,000 | | | | | | | | | | | | | | | | |
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 | $ 2,000,000 | | | | | | | | | | | | |
Debt Instrument, Face Amount | | | | | | | | | | | | | | 300,000,000 | | | | | | | | | | | | | |
Gains (Losses) on Extinguishment of Debt, Total | | | | | | | | | | | 1,500,000 | | | $ 6,200 | 4,500 | | | | | | | | | | | | |
Amortization of Financing Costs | | | | | | | | | | | | | | | $ 12,000 | | | | | | | | | | | | |
Line of Credit Facility, Maximum Borrowing Capacity | | | | | | | | | | | | | | | | | $ 300,000,000 | | 300,000,000 | | | | | | | | |
Time Brokerage Agreement [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Liabilities Arising from Contingencies, Amount Recognized | | | | | | | | | | | | | | | | | | | | | | | | | | | $ 1,200,000 |
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 | | | | | | | | | | | | | | | | |
FM Translator construction permit, Quartz Site, Arizona (asset purchase) [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Consideration Transferred, Total | | | | $ 20,000 | | | | | | | | | | | | | | | 20,000 | | | | | | | | |
FM Translator construction permit, Roseburg, Oregon (asset purchase) [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Consideration Transferred, Total | | | | | $ 45,000 | | | | | | | | | | | | | | 45,000 | | | | | | | | |
FM Translator, Astoria, Oregon (asset purchase) [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Consideration Transferred, Total | | | | | | | | | | | | | | | | $ 33,000 | | | 33,000 | | | | | | | | |
FM Translator construction permit, Mohave Valley, Arizona (asset purchase) [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Consideration Transferred, Total | | | | | | $ 20,000 | | | | | | | | | | | | | $ 20,000 | | | | | | | | |
FM translator in Festus, Missouri [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Liabilities Arising from Contingencies, Amount Recognized | | | | | | | | | | | | | | | | | | | | | | $ 40,000 | $ 40,000 | | | | |
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 | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Contingent Consideration, Liability, Current | | | 20,000 | | | | | | | | | | | | | | | | | | | | | | | | |
Estimated Contingent Earn-out Consideration | | | $ 16,500 | | | | | | $ 20,000 | | | | | | | | | | | | $ 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 | | | |
Business Acquisition Installments Payable | | | | | | | | | | | | | | | | | | | | | | | | $ 15,000 | | | |
Radio Station WSPZ-AM [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Consideration Transferred, Total | | | | | | | $ 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 | | | | | | | | | | | | | | | | | | | |
Goodwill | | | | | | | | 400,000 | | | | | | | | | | | | | | | | | | | |
Intelligence Report Newsletter [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Goodwill | | | | | | | | 400,000 | | | | | | | | | | | | | | | | | | | |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, 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 | | | | | | | | | | | | | | | | | | | | | | | | | |
Goodwill | | 900 | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Contingent Consideration, Liability, Current | | 100,000 | | | | | | | | | | | | | | | | | | | | | | | | | |
Estimated Contingent Earn-out Consideration | | $ 18,750 | | | | | | | | | | | | | | | | | | | | | | | | | |
WSPZ-AM in Bethesda, Maryland Assets purchase [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Business Combination, Consideration Transferred, Total | | | | | | | $ 600,000 | | | | | | | | | | | | | | | | | | | | |