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Basis of Presentation and Summary of Significant Accounting Policies (Textual) (Details)
3 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
operating_segment
reporting_unit
Dec. 31, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Accounting Policies [Abstract]        
Maturity Date of Highly Liquid Investments 3 months      
Cash and Cash Equivalents, at Carrying Value $ 22,163,000 $ 23,273,000 $ 22,159,000 $ 26,487,000
Cash 11,100,000      
Money market funds $ 11,100,000      
Number of Operating Segments | operating_segment 1      
Number of Reportable Segments | reporting_unit 1      
Goodwill Impairment $ 0 $ 0