Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenue.
Revenue from Contract with Customer, Including Assessed Tax	$ 29,821	$ 28,046	$ 54,788	$ 50,347
Revenue, Remaining Performance Obligation, Optional Exemption, Performance Obligation [true false]			true
Broadcast Advertising Revenue, Net [Member]
Revenue.
Revenue from Contract with Customer, Including Assessed Tax	25,436	24,944	$ 47,023	44,951
Digital Advertising Revenue [Member]
Revenue.
Revenue from Contract with Customer, Including Assessed Tax	2,233	1,636	3,982	2,636
Other Revenue [Member]
Revenue.
Revenue from Contract with Customer, Including Assessed Tax	$ 2,152	$ 1,466	$ 3,783	$ 2,760