STOCKHOLDERS' EQUITY (Details Textual) - USD ($) | Oct. 06, 2014 | Jun. 16, 2016 | Oct. 26, 2015 | Jun. 16, 2015 | Apr. 20, 2015 | Sep. 30, 2014 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015 | Dec. 31, 2014 | Sep. 23, 2016 | Dec. 31, 2009 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Repurchased During Period, Value | | | | | | | | | $ 3,584,000 | | | | | |
Share-based Compensation, Total | | | | | | | $ 782,000 | $ 1,000,000 | $ 2,319,000 | $ 3,795,000 | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares | | | | | | | | | | 293,338 | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | | | | | | | | 50,000 | 0 | 50,000 | | | | |
Restricted Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options | | | | | | | $ 1,200,000 | | $ 1,200,000 | | | | | |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition | | | | | | | | | 6 months 24 days | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period | | | | | | | 157,728 | 93,680 | 158,000 | | | | | |
Employee Stock Option [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | | | | | | | | | 0 | | | | | |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options | | | | | | | $ 694,000 | | $ 694,000 | | | | | |
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition | | | | | | | | | 7 months 15 days | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | | | | | | | | | $ 1.39 | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Vested and Expected To Vest, Outstanding, Number | | | | | | | 3,589,000 | | 3,589,000 | | | | | |
Long Tern Incentive Plan [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures | | | | | | 410,000 | | | | | | | | |
Non Executive Directors [Member] | Restricted Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures | | | | | | | | | | | 68,680 | 56,050 | | |
Cathy Hughes [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock vesting in approximately equal 1/3 tranches on April 20, 2015, December 31, 2015 and December 31, 2016 | | | | | |
Alfred C. Liggins [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock vesting in approximately equal 1/3 tranches on April 20, 2015, December 31, 2015 and December 31, 2016 | | | | | |
Peter Thompson [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock with 200,000 shares vesting on April 20, 2015, and with the remaining shares vesting in equal 75,000 share tranches on December 31, 2015 and December 31, 2016 | | | | | |
Executives and LTIP Participants [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures | | | | | | | | | | | | 2,424,000 | | |
Founder and Executive Chairperson [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock, vesting in approximately equal 1/3 tranches on April 6, 2015, December 31, 2015 and December 31, 2016. | | | | | |
President and Chief Executive Officer [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock, vesting in approximately equal 1/3 tranches on April 6, 2015, December 31, 2015 and December 31, 2016. | | | | | |
Executive Vice President and Chief Financial Officer [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock vesting in equal 112,500 share tranches on December 31, 2015 and December 31, 2016. | | | | | |
President Radio Division [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock vesting in approximately equal 1/3 tranches on April 20, 2015, December 31, 2015 and December 31, 2016 | | | | | |
Linda Vilardo [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock vesting in equal 75,000 share tranches on April 20, 2015, December 31, 2015 and December 31, 2016 | | | | | |
Executive Vice President and Chief Administrative Officer [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights | | | | | | | | | Class D common stock vesting in equal 75,000 share tranches on April 20, 2015, December 31, 2015 and December 31, 2016. | | | | | |
Common Class D [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Repurchased During Period, Shares | | | | | | | 619,418 | | 1,585,703 | | | | | |
Stock Repurchased During Period, Value | | | | | | | $ 1,900,000 | | $ 1,000 | | | | | |
Repurchase Of Common Stock Price Per Share | | | | | | | $ 3.01 | | $ 2.40 | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | | | | | | | 8,250,000 | | 8,250,000 | | | | | |
Common Class D [Member] | Stock Plan 2009 [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | | | | | | | 7,000,000 | | 7,000,000 | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized | | | | | | | | | | | | | | 8,250,000 |
Common Class D [Member] | Amended and Restated 2009 Stock Plan [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | | | | | | | 8,012,932 | | 8,012,932 | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee | | | | | | | | | 1,000,000 | | | | | |
Common Class D [Member] | Stock Vest Tax Repurchase [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Repurchased During Period, Shares | | | | | | | | | 330,111 | 345,293 | | | | |
Stock Repurchased During Period, Value | | | | | | | | | $ 568,000 | $ 1,400,000 | | | | |
Repurchase Of Common Stock Price Per Share | | | | | | | | | $ 1.72 | $ 4.12 | | | | |
Common Class D [Member] | CEO, Radio Division [Member] | Restricted Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures | | | 100,000 | | | | | | | | | | | |
Common Class D [Member] | CEO, Radio Division [Member] | Employee Stock Option [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | | | 300,000 | | | | | | | | | | | |
Common Class D [Member] | Non Executive Directors [Member] | Restricted Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures | | 13,736 | | 18,182 | | | | | | | | | | |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures | | $ 50,000 | | $ 50,000 | | | | | | | | | | |
Common Class D [Member] | Cathy Hughes [Member] | Restricted Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | 456,000 | | | | | | | | | | | | | |
Common Class D [Member] | Cathy Hughes [Member] | Employee Stock Option [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | 293,000 | | | | | | | | | | | | | |
Common Class D [Member] | Alfred C. Liggins [Member] | Restricted Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | 913,000 | | | | | | | | | | | | | |
Common Class D [Member] | Alfred C. Liggins [Member] | Employee Stock Option [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | 587,000 | | | | | | | | | | | | | |
Common Class D [Member] | Peter Thompson [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | | | | | 200,000 | | | | | | 112,500 | | | |
Common Class D [Member] | Peter Thompson [Member] | Share-based Compensation Award, Tranche One [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Vested and Expected To Vest, Outstanding, Number | | | | | | | | | | | 75,000 | | | |
Common Class D [Member] | Peter Thompson [Member] | Restricted Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | 350,000 | | | | | | | | | | | | | |
Common Class D [Member] | Peter Thompson [Member] | Employee Stock Option [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | | | | | | | | | | | 225,000 | | | |
Common Class D [Member] | Linda Vilardo [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | | | | | 75,000 | | | | | | | | | |
Common Class D [Member] | Linda Vilardo [Member] | Restricted Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross | 225,000 | | | | | | | | | | | | | |
Class A and D Common Stock [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Repurchase Program, Authorized Amount | | | | | | | $ 7,000,000 | | $ 7,000,000 | | | | | |
Class A and D Common Stock [Member] | Repurchase Program 2015 [Member] | | | | | | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | | | | | | | | | | | |
Stock Repurchase Program, Authorized Amount | | | | | | | | | | | $ 3,500,000 | | $ 7,000,000 | |