Fair Value Measurements (Details) - Recurring - USD ($) $ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Financial Assets | ||
| Cash and cash equivalents | $ 199,874 | $ 143,180 |
| Total financial assets | 201,813 | 143,500 |
| Financial Liabilities | ||
| Warrant Liability | 289 | |
| Total financial liabilities | 289 | |
| Money market funds | Other current assets | ||
| Financial Assets | ||
| Restricted cash | 320 | 320 |
| Money market funds | Other non-current assets | ||
| Financial Assets | ||
| Restricted cash | 1,619 | |
| Level 1 | ||
| Financial Assets | ||
| Cash and cash equivalents | 199,874 | 143,180 |
| Total financial assets | 201,813 | 143,500 |
| Level 1 | Money market funds | Other current assets | ||
| Financial Assets | ||
| Restricted cash | 320 | 320 |
| Level 1 | Money market funds | Other non-current assets | ||
| Financial Assets | ||
| Restricted cash | $ 1,619 | |
| Level 3 | ||
| Financial Liabilities | ||
| Warrant Liability | 289 | |
| Total financial liabilities | $ 289 |