Operating Segments - Summary of Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Net revenue:
Net revenue	$ 37,355	$ 33,906
Engineering and programming expenses:
Engineering and programming expenses	7,031	6,563
Selling, general and administrative expenses:
Selling, general and administrative expenses	19,254	14,850
Corporate expenses	2,751	2,798
Depreciation and amortization:
Depreciation and amortization	873	1,025
Recapitalization costs:
Recapitalization costs	1,930	1,082
Other operating income:
Other operating income	(53)	(1)
Operating income:
Operating income	5,569	7,589
Capital expenditures:
Capital expenditures	1,173	248
Assets
Total Assets	455,098		$ 444,312
Operating Segments | Radio
Net revenue:
Net revenue	34,079	29,251
Engineering and programming expenses:
Engineering and programming expenses	5,481	5,381
Selling, general and administrative expenses:
Selling, general and administrative expenses	17,666	12,126
Depreciation and amortization:
Depreciation and amortization	376	427
Other operating income:
Other operating income	(53)
Operating income:
Operating income	10,609	11,317
Capital expenditures:
Capital expenditures	610	225
Assets
Total Assets	395,352		386,303
Operating Segments | Television
Net revenue:
Net revenue	3,276	4,655
Engineering and programming expenses:
Engineering and programming expenses	1,550	1,182
Selling, general and administrative expenses:
Selling, general and administrative expenses	1,588	2,724
Depreciation and amortization:
Depreciation and amortization	444	537
Operating income:
Operating income	(306)	212
Capital expenditures:
Capital expenditures	405	17
Assets
Total Assets	56,555		55,052
Corporate, Non-Segment
Selling, general and administrative expenses:
Corporate expenses	2,751	2,798
Depreciation and amortization:
Depreciation and amortization	53	61
Recapitalization costs:
Recapitalization costs	1,930	1,082
Other operating income:
Other operating income		(1)
Operating income:
Operating income	(4,734)	(3,940)
Capital expenditures:
Capital expenditures	158	$ 6
Assets
Total Assets	$ 3,191		$ 2,957