Statements of Comprehensive Loss Parenthetical (Parenthetical) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
Stock-based compensation expense associated with research and development expense | $ 1,698 | $ 1,472 | $ 5,369 | $ 4,522 |
Stock-based compensation expense associated with selling, general and administrative expense | $ 1,864 | $ 1,405 | $ 5,370 | $ 4,327 |