ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual) - USD ($)		3 Months Ended		12 Months Ended
	Jan. 02, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018	Jan. 01, 2019	Dec. 20, 2018	Apr. 18, 2017	Nov. 30, 2016	Apr. 10, 2015
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross		$ 0		$ 350,000,000
Debt Instrument, Fair Value Disclosure				$ 332,500,000
Cost of Goods and Services Sold		30,950,000	$ 32,147,000
Selling, General and Administrative Expense, Total		33,139,000	35,235,000
Debt Instrument, Interest Rate, Stated Percentage				9.25%
Reassessed Estimated Fair Value of Award		26,000,000		$ 25,700,000
Related Party Transaction, Due from (to) Related Party, Total		$ 2,100,000		208,000
Related Party Transaction, Terms and Manner of Settlement		Distributions from operating income or operating revenues, depending upon the year, are in the following order until the funds are depleted: up to $250,000 to the Foundation, reimbursement of Reach’s expenditures, up to $1.0 million fee to Reach, a performance bonus of up to 50% of remaining operating income to Reach, with the balance remaining with the Foundation.
Revenues		$ 98,449,000	99,621,000
Impairment of Long-Lived Assets Held-for-use		$ 0	6,556,000
Related Party Transaction Revenue Terms and Manner of Settlement		For years 2020 through 2022, $250,000 to the Foundation is guaranteed. Reach Media’s earnings for the Fantastic Voyage® may not exceed $1.7 million in 2018 and 2019, nor $1.75 million in 2020 and thereafter.
Operating Lease, Right-of-Use Asset		$ 47,910,000		0
Operating Lease, Liability		52,517,000
Accounting Standards Update 2016-02 [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Operating Lease, Right-of-Use Asset					$ 49,800,000
Operating Lease, Liability					54,100,000
Cumulative Effect on Retained Earnings, Net of Tax	$ 5,800,000
Deferred Rent Credit					$ 4,300,000
Customer Advances [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Revenues		1,400,000	1,500,000
Credit Facility 2017 [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross		323,100,000		323,900,000			$ 350,000,000
Debt Instrument, Fair Value Disclosure		307,600,000		305,800,000
Debt Instrument, Face Amount							$ 350,000,000
Credit Facility 2018 [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross		181,400,000		192,000,000
Debt Instrument, Fair Value Disclosure		185,100,000		195,900,000
Debt Instrument, Face Amount						$ 192,000,000
Staffing And Recruiting Services [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Related Party Transaction, Amounts of Transaction		$ 0	22,000
Comcast Note [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross				11,900,000
Debt Instrument, Fair Value Disclosure				11,900,000
Debt Instrument, Interest Rate, Stated Percentage		10.47%
Debt Instrument, Face Amount		$ 11,900,000
MGM National Harbor [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross		50,500,000		50,100,000
Debt Instrument, Fair Value Disclosure		56,600,000		$ 56,100,000
Investment Owned, at Cost								$ 35,000,000	$ 5,000,000
Other Income		1,700,000	1,600,000
Employment Agreement Award [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Selling, General and Administrative Expense, Total		1,900,000	1,200,000
Barter Transactions [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Revenue from Contract with Customer, Including Assessed Tax		566,000	749,000
Cost of Goods and Services Sold		416,000	708,000
Selling, General and Administrative Expense, Total		150,000	41,000
Radio broadcasting and Reach Media segments [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Sales Commissions and Fees		4,800,000	5,300,000
Launch Support Assets [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Selling, General and Administrative Expense, Total		$ 151,000	0
Finite Lived Intangible Assets Weighted Average Amortization Period		7 years 9 months 18 days		7 years 9 months 18 days
Finite Lived Intangible Assets Remaining Weighted Average Amortization Period		5 years 9 months 18 days		6 years 1 month 6 days
Amortization of Intangible Assets		$ 105,000	105,000
Detroit Market Radio Broadcasting Licenses [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Impairment of Long-Lived Assets Held-for-use			3,800,000
Charlotte Market Radio Broadcasting Licenses [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Impairment of Long-Lived Assets Held-for-use			2,700,000
Tom Joyner Foundation Inc [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Related Party Transaction, Due from (to) Related Party, Total		34,000		$ 34,000
Tom Joyner Limited [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Related Party Transaction, Due from (to) Related Party, Total		$ 3,000		$ 2,000
Chief Executive Officer [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Percentage Of Award Amount				4.00%
Senior Subordinated Notes due February 2020 [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross				$ 2,000,000
Debt Instrument, Fair Value Disclosure				$ 2,000,000
Debt Instrument, Interest Rate, Stated Percentage		9.25%
Senior Subordinated Notes due March 2022 [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross		$ 350,000,000
Debt Instrument, Fair Value Disclosure		$ 340,400,000
Debt Instrument, Interest Rate, Stated Percentage		7.375%
MGM National Harbor Loan [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross		$ 50,500,000
Debt Instrument, Face Amount		50,000,000
ABL Facility [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Long-term Debt, Gross		3,000,000
Debt Instrument, Fair Value Disclosure		3,000,000
Tv One Llc [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Sales Commissions and Fees		$ 3,700,000	$ 3,500,000
Reach Media Inc [Member]
ORGANIZATION AND SIGNIFICANT ACCOUNTING POLICIES [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent		80.00%