ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net Revenue	$ 107,593	$ 76,008	$ 199,033	$ 170,883
Radio Advertising [Member]
Net Revenue	42,605	25,358	75,944	63,776
Political Advertising [Member]
Net Revenue	500	361	1,280	2,764
Digital Advertising [Member]
Net Revenue	15,016	6,104	25,369	12,393
Cable Television Advertising [Member]
Net Revenue	22,968	18,941	43,670	39,973
Cable Television Affiliate Fees [Member]
Net Revenue	25,396	24,619	50,883	50,826
Event Revenues & Other [Member]
Net Revenue	$ 1,108	$ 625	$ 1,887	$ 1,151