GOODWILL AND RADIO BROADCASTING LICENSES - Additional Information (Details) $ in Thousands	3 Months Ended			6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($)	Sep. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2019 USD ($)
GOODWILL AND RADIO BROADCASTING LICENSES
Number of reportable segments | segment				4
Goodwill, impairment loss				$ 4,325
Radio Broadcasting Licenses [Member]
GOODWILL AND RADIO BROADCASTING LICENSES
Impairment charge	$ 12,600			12,600
Radio Broadcasting Licenses [Member] | INDIANA
GOODWILL AND RADIO BROADCASTING LICENSES
Impairment charge	1,900			1,900
Radio Broadcasting Licenses [Member] | Atlanta Dallas Houston And Raleigh Market Radio Broadcasting Licenses [Member]
GOODWILL AND RADIO BROADCASTING LICENSES
Impairment charge	10,700			10,700
Fair value adjustment understated (overstated)		$ 2,300	$ (2,800)		$ (2,100)	$ (1,100)
Radio Broadcasting Licenses [Member] | Atlanta Dallas Houston And Raleigh Market Radio Broadcasting Licenses [Member] | Revision of Prior Period, Adjustment [Member]
GOODWILL AND RADIO BROADCASTING LICENSES
Impairment charge	$ 3,700
Radio Market Reporting Units [Member]
GOODWILL AND RADIO BROADCASTING LICENSES
Goodwill, impairment loss				$ 4,300