Basis of Presentation and Summary of Significant Accounting Policies (Textual) (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) operating_segment reporting_unit	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Accounting Policies [Abstract]
Maturity Date of Highly Liquid Investments			3 months
Cash and Cash Equivalents, at Carrying Value	$ 16,963,000	$ 21,522,000	$ 16,963,000	$ 21,522,000	$ 26,487,000	$ 22,130,000
Cash	5,900,000		5,900,000
Money market funds	11,100,000		$ 11,100,000
Number of Operating Segments | operating_segment			1
Number of Reportable Segments | reporting_unit			1
Goodwill Impairment					$ 0
Provision for (benefit from) income taxes	$ 274,000	$ 253,000	$ (144,000)	$ (314,000)