Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid during the period for:
Interest	$ 100	$ 145	$ 253
Income taxes	2,790	4,160	3,450
Non-cash transactions:
Barter revenue	2,402	2,431	2,125
Barter expense	2,452	2,477	2,124
Acquisition of property and equipment	55	2
Use of treasury shares for 401(k) match	$ 256	$ 249	$ 221