ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net Revenue	$ 91,912	$ 111,055	$ 262,795	$ 331,075
Radio Advertising [Member]
Net Revenue	34,919	50,813	98,695	144,958
Political Advertising [Member]
Net Revenue	4,324	300	7,089	741
Digital Advertising [Member]
Net Revenue	8,121	8,171	20,514	23,270
Cable Television Advertising [Member]
Net Revenue	19,603	20,649	59,576	60,658
Cable Television Affiliate Fees [Member]
Net Revenue	24,421	25,330	75,247	79,404
Event Revenues & Other [Member]
Net Revenue	$ 524	$ 5,792	$ 1,674	$ 22,044