Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details 3)

v3.7.0.1
Stockholders' Equity (Details 3) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee Benefits and Share-based Compensation $ 2,382 $ 803 $ 3,361 $ 1,891
Research and Development Expense [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee Benefits and Share-based Compensation 1,946 457 2,352 1,225
General and Administrative Expense [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Employee Benefits and Share-based Compensation $ 436 $ 346 $ 1,009 $ 666