ASSETS HELD FOR SALE - Narrative (Details)	3 Months Ended
	Jun. 30, 2020 USD ($) license	Dec. 31, 2019 USD ($)
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	$ 509,000	$ 10,188,000
Number Of Broadcasting Licenses | license	2
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Equipment And Broadcasting License
Long Lived Assets Held-for-sale [Line Items]
Net assets held for sale	$ 10,200,000
Total proceeds	10,800,000
Gain on sale	$ 200,000