Debt - Repayment Schedule (Details) $ in Thousands |
Dec. 31, 2015
USD ($)
|
|---|---|
| Debt Disclosure [Abstract] | |
| 2018 | $ 17,200 |
| 2019 | 17,200 |
| 2020 | 8,600 |
| Principal amounts repayable | 43,000 |
| Unamortized debt discount | (357) |
| Total long-term debt, net of discount | $ 42,643 |