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Stock-Based Compensation (Details Textual) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 9 Months Ended
Apr. 30, 2015
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation, Total   $ 3,612 $ 1,926  
Equity Incentive Plan 2013 [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 1.29    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   3,640,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   1,797,900    
Common Stock, Capital Shares Reserved for Future Issuance   3,640,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning Balance   $ 3.38   $ 4.73
Equity Incentive Plan 2013 [Member] | President and Chief Executive Officer [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 725,627      
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost $ 1,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 387,000      
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number 290,252      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number 48,375      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Beginning Balance $ 4.29      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 7 years      
Due to Employees, Current $ 1,000      
Share-based Compensation, Total $ 1,100