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Long-Term Debt and Other Financings (Tables) | 12 Months Ended
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Dec. 31, 2018
Debt Disclosure [Abstract] |
Interest Expense and Amortization of Debt Issuance Costs and Discounts | Amortization of debt issuance costs and discounts are included in interest expense. Interest expense in the consolidated statements of operations and comprehensive (loss) income for the years ended December 31, 2018 and 2017, relates to the following debt instruments (in thousands):
| Year Ended December 31, |
| 2018 |  |  | 2017 |
Novartis note | $ | 627 |  |  | $ | 490 |
SVB loan |  | 258 |  |  |  | — |
Servier loan |  | — |  |  |  | 431 |
Hercules loan |  | — |  |  |  | 311 |
Other |  | 37 |  |  |  | 6 |
Total interest expense | $ | 922 |  |  | $ | 1,238 |

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