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Stock Options (Details Textual) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2016
Jun. 07, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Employee Service Share-Based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized $ 1.7  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 26 months  
2013 Stock Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Shares Authorized   5,858,892