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Stock-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 9 Months Ended
May. 31, 2015
Dec. 31, 2015
Oct. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized compensation cost related to unvested stock options   $ 8.8  
Weighted average recognition period   3 years 2 months 12 days  
Employees [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 465,633    
Granted, Weighted Average Exercise Price $ 7.80    
Board of Directors [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 20,835    
Warrant [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Intrinsic value per share   $ 2.02  
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Gross   2,512,179  
Granted, Weighted Average Exercise Price   $ 3.93  
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Estimated forfeiture rate   0.00%  
Intrinsic value per share   $ 2.02  
Stock Issued During Period, Shares, New Issues 355,001    
Plan 2015 [Member] | Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total shares available for future grant   3,091,600 5,000,000