Stock Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2020 |
Dec. 31, 2019 |
|
| Board of Directors | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Nonemployee services transaction, quarterly fee | $ 33 | |
| The 2009 Stock Incentive Plan | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Common stock, shares outstanding (in shares) | 677 | |
| Compensation cost not yet recognized | $ 10,848 | |
| Period for recognition for compensation cost not yet recognized | 2 years 7 months 6 days | |
| The 2009 Stock Incentive Plan | Restricted Stock Units (RSUs) | ||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Weighted average grant date fair value (in dollars per share) | $ 19.80 | $ 24.82 |