Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended									12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment reporting information
Net operating revenue	$ 37,289	$ 36,119	$ 36,438	$ 32,745	$ 35,606	$ 33,831	$ 34,358	$ 29,061		$ 142,591	$ 132,856	$ 133,998
Station operating expense	25,978	25,459	25,420	24,685	25,868	24,324	24,311	22,765		101,542	97,268	98,424
Corporate general and administrative	2,915	2,728	2,620	2,717	2,449	2,577	2,583	2,482		10,980	10,091	8,901
Other operating (income) expense, net	(8)	(1,393)	8	0	94	433	14	0		1,393	(541)	1,210
Impairment of intangible assets	0	0	0	0	874	0	0	0	$ 1,936	0	874	1,936
Operating income (loss) from continuing operations	8,404	$ 9,325	$ 8,390	$ 5,343	6,321	$ 6,497	$ 7,450	$ 3,814		31,462	24,082	25,947
Capital additions										4,861	5,543	5,524
Broadcast licenses, net	96,229				88,106				$ 86,762	96,229	88,106	86,762
Total assets	221,020				204,571					221,020	204,571
Radio [Member]
Segment reporting information
Net operating revenue										118,955	111,792	113,627
Station operating expense										86,799	83,188	85,167
Corporate general and administrative										0	0	0
Other operating (income) expense, net										(1,351)	499	(1,210)
Impairment of intangible assets										0	874	1,936
Operating income (loss) from continuing operations										33,507	27,231	27,734
Depreciation and amortization										5,555	5,135	5,023
Capital additions										3,246	3,436	3,856
Broadcast licenses, net	86,662				78,499					86,662	78,499
Total assets	162,434				150,855					162,434	150,855
Television [Member]
Segment reporting information
Net operating revenue										23,636	21,064	20,371
Station operating expense										14,743	14,080	13,257
Corporate general and administrative										0	0	0
Other operating (income) expense, net										(42)	32	0
Impairment of intangible assets										0	0	0
Operating income (loss) from continuing operations										8,935	6,952	7,114
Depreciation and amortization										1,387	1,399	1,411
Capital additions										894	1,970	929
Broadcast licenses, net	9,607				9,607					9,607	9,607
Total assets	22,674				23,091					22,674	23,091
Corporate and Other [Member]
Segment reporting information
Net operating revenue										0	0	0
Station operating expense										0	0	0
Corporate general and administrative										10,980	10,091	8,901
Other operating (income) expense, net										0	10	0
Impairment of intangible assets										0	0	0
Operating income (loss) from continuing operations										(10,980)	(10,101)	(8,901)
Depreciation and amortization										321	290	268
Capital additions										721	137	739
Broadcast licenses, net	0				0					0	0
Total assets	35,912				30,625					35,912	30,625
Consolidated Segments [Member]
Segment reporting information
Net operating revenue										142,591	132,856	133,998
Station operating expense										101,542	97,268	98,424
Corporate general and administrative										10,980	10,091	8,901
Other operating (income) expense, net										(1,393)	541	(1,210)
Impairment of intangible assets										0	874	1,936
Operating income (loss) from continuing operations										31,462	24,082	25,947
Depreciation and amortization										7,263	6,824	6,702
Capital additions										4,861	5,543	$ 5,524
Broadcast licenses, net	96,229				88,106					96,229	88,106
Total assets	$ 221,020				$ 204,571					$ 221,020	$ 204,571