Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Effect of Fourth Quarter Events [Line Items]
Net operating revenue	$ 35,606	$ 33,831	$ 34,358	$ 29,061	$ 36,371	$ 34,373	$ 33,831	$ 29,423		$ 132,856	$ 133,998	$ 129,478
Station operating expenses	25,868	24,324	24,311	22,765	25,612	26,366	23,499	22,947		97,268	98,424	92,977
Corporate G&A	2,449	2,577	2,583	2,482	2,321	2,307	2,120	2,153		10,091	8,901	8,172
Other operating expense (income), net	94	433	14	0	(1,210)	0	0	0
Impairment of intangible assets	874	0	0	0	1,936	0	0	0	$ 2,033	874	1,936	2,033
Operating income from continuing operations	6,321	6,497	7,450	3,814	7,712	5,700	8,212	4,323		24,082	25,947	26,296
Other (income) expenses:
Interest expense	174	229	244	241	252	268	272	272		888	1,064	1,305
Write-off of debt issuance costs		557	0	0			0	0		557	0	55
Other (income) expenses	0	0	(409)	(8)	(33)	7	(30)	(15)		(417)	(71)	(106)
Income before income tax	6,147	5,711	7,615	3,581	7,493	5,425	7,970	4,066		23,054	24,954	25,042
Income tax provision	2,450	2,599	3,141	1,450	3,050	2,180	3,193	1,627		9,640	10,050	9,992
Net income	$ 3,697	$ 3,112	$ 4,474	$ 2,131	$ 4,443	$ 3,245	$ 4,777	$ 2,439		$ 13,414	$ 14,904	$ 15,273
Basic earnings per share	$ 0.63	$ 0.54	$ 0.77	$ 0.37	$ 0.77	$ 0.56	$ 0.83	$ 0.43		$ 2.31	$ 2.57	$ 2.66
Weighted average common shares	5,732	5,724	5,712	5,710	5,709	5,699	5,699	5,690		5,706	5,700	5,681
Diluted earnings per share	$ 0.63	$ 0.53	$ 0.77	$ 0.36	$ 0.76	$ 0.56	$ 0.82	$ 0.42		$ 2.29	$ 2.55	$ 2.64
Weighted average common and common equivalent shares	5,741	5,752	5,757	5,762	5,757	5,742	5,754	5,757		5,740	5,753	5,745