Nature of Business and Significant Accounting Policies (Details 3) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accounts receivable:
Threshold period for considering receivable as past due	90 days
Changes in the allowance for doubtful accounts
Beginning of Year	$ 1,073,000	$ 651,000	$ 180,000
Additions	920,000	462,000	519,000
Write-offs	482,000	45,000	51,000
Recoveries	1,000	5,000	3,000
End of Year	1,512,000	1,073,000	651,000
Programming rights:
Impairment of programming rights	0	0	0
Amortization of programming rights	11,703,000	10,370,000	$ 9,322,000
Accumulated amortization of programming rights	$ 19,700,000	$ 16,200,000