Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Incremental Direct Costs [Abstract]
Advertising and marketing expenses	$ 657,000	$ 1,506,000	$ 1,482,000	$ 4,227,000
Prepaid advertising costs