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Long-Term Debt (Tables) | 6 Months Ended
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Jun. 30, 2018
Debt Disclosure [Abstract] |
Interest Expense and Amortization of Debt Issuance Costs | Amortization of debt issuance costs and discounts are included in interest expense. Interest expense in the condensed consolidated statements of operations and comprehensive (loss) income relates to the following debt instruments (in thousands):
| Three Months Ended June 30, |  |  | Six Months Ended June 30, |
| 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Novartis note | $ | 144 |  |  | $ | 119 |  |  | $ | 283 |  |  | $ | 236 |
Servier loan |  | — |  |  |  | 178 |  |  |  | — |  |  |  | 355 |
Hercules loan |  | — |  |  |  | — |  |  |  | — |  |  |  | 311 |
SVB loan |  | 12 |  |  |  | — |  |  |  | 12 |  |  |  | — |
Other |  | 22 |  |  |  | — |  |  |  | 53 |  |  |  | 4 |
Total interest expense | $ | 178 |  |  | $ | 297 |  |  | $ | 348 |  |  | $ | 906 |

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- Definition Tabular disclosure of aggregate amount of interest expense and the amortization of debt issuance costs on all borrowings. + References No definition available. + Details
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