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Summary of Significant Accounting Policies (Details Textual) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Summary Of Significant Accounting Policies [Line Items]        
Number of stock options outstanding having antidilutive effect 0 59,000 0 45,000