Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Accounting for Share-Based Compensation) (Details)

v3.5.0.2
Significant Accounting Policies (Accounting for Share-Based Compensation) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Basis of Presentation [Line Items]    
Share-based compensation expense total $ 4,118 $ 2,914
Research and development expenses    
Basis of Presentation [Line Items]    
Share-based compensation expense total 1,585 920
General and administrative expenses    
Basis of Presentation [Line Items]    
Share-based compensation expense total $ 2,533 $ 1,994