Broadcast Licenses, Goodwill and Other Intangible Assets (Details Textual) - USD ($)	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
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets	$ 0	$ 0	$ 0	$ 0	$ 874,000	$ 0	$ 0	$ 0	$ 1,936,000	$ 0	$ 874,000	$ 1,936,000
Amortization Expense										642,000	$ 231,000	$ 54,000
2017	653,000									653,000
2018	476,000									476,000
2019	82,000									82,000
2020	67,000									67,000
2021	$ 41,000									$ 41,000