Quarterly report pursuant to Section 13 or 15(d)

Share Based Compensation (Stock-Based Compensation Expense Recognized) (Details)

v3.7.0.1
Share Based Compensation (Stock-Based Compensation Expense Recognized) (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expense $ 1,086 $ 2
Unrecognized compensation expense $ 3,200  
Weighted average period for recognition 2 years 3 months 18 days  
Weighted average fair value of options granted $ 1.80  
Research And Development Expense [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expense $ 163 1
General And Administrative Expense [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Stock-based compensation expense $ 923 $ 1