Statements of Comprehensive Loss Parenthetical (Parenthetical) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2016 |
Jun. 30, 2015 |
Jun. 30, 2016 |
Jun. 30, 2015 |
|
Stock-based compensation expense associated with research and development expense | $ 973 | $ 868 | $ 1,962 | $ 1,972 |
Stock-based compensation expense associated with general and administrative expense | $ 984 | $ 920 | $ 1,830 | $ 1,769 |