Operating Segments - Summary of Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Net revenue:
Net revenue	$ 34,038	$ 32,791	$ 102,724	$ 98,322
Engineering and programming expenses:
Engineering and programming expenses	6,368	7,361	19,425	22,796
Selling, general and administrative expenses:
Selling, general and administrative expenses	14,444	14,713	42,458	45,716
Corporate expenses	2,132	2,424	8,175	7,421
Depreciation and amortization:
Depreciation and amortization	910	1,087	2,906	3,330
Gain on the disposal of assets, net of disposal costs:
Gain on the disposal of assets, net of disposal costs	(12,671)		(12,721)	(12,827)
Recapitalization costs:
Recapitalization costs	2,286	1,423	4,727	5,799
Impairment charges:
Impairment charges			483
Operating income:
Operating income	20,569	5,783	37,271	26,087
Capital expenditures:
Capital expenditures	765	455	1,746	905
Assets
Total Assets	437,669		437,669		$ 435,904
Operating Segments | Radio
Net revenue:
Net revenue	30,255	29,310	90,785	88,813
Engineering and programming expenses:
Engineering and programming expenses	5,303	5,496	16,016	17,367
Selling, general and administrative expenses:
Selling, general and administrative expenses	13,191	13,283	37,228	41,304
Depreciation and amortization:
Depreciation and amortization	420	453	1,256	1,389
Gain on the disposal of assets, net of disposal costs:
Gain on the disposal of assets, net of disposal costs	(159)		(171)	(12,826)
Operating income:
Operating income	11,500	10,078	36,456	41,579
Capital expenditures:
Capital expenditures	588	345	1,461	658
Assets
Total Assets	381,506		381,506		378,472
Operating Segments | Television
Net revenue:
Net revenue	3,783	3,481	11,939	9,509
Engineering and programming expenses:
Engineering and programming expenses	1,065	1,865	3,409	5,429
Selling, general and administrative expenses:
Selling, general and administrative expenses	1,253	1,430	5,230	4,412
Depreciation and amortization:
Depreciation and amortization	432	557	1,473	1,675
Gain on the disposal of assets, net of disposal costs:
Gain on the disposal of assets, net of disposal costs	29		(9)	(1)
Impairment charges:
Impairment charges			483
Operating income:
Operating income	1,004	(371)	1,353	(2,006)
Capital expenditures:
Capital expenditures	76	62	150	129
Assets
Total Assets	53,901		53,901		54,836
Corporate, Non-Segment
Selling, general and administrative expenses:
Corporate expenses	2,132	2,424	8,175	7,421
Depreciation and amortization:
Depreciation and amortization	58	77	177	266
Gain on the disposal of assets, net of disposal costs:
Gain on the disposal of assets, net of disposal costs	(12,541)		(12,541)
Recapitalization costs:
Recapitalization costs	2,286	1,423	4,727	5,799
Operating income:
Operating income	8,065	(3,924)	(538)	(13,486)
Capital expenditures:
Capital expenditures	101	$ 48	135	$ 118
Assets
Total Assets	$ 2,262		$ 2,262		$ 2,596