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Long-Term Debt (Tables) | 3 Months Ended
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Mar. 31, 2019
Debt Disclosure [Abstract] |
Summary of Long Term Debt | Long-term debt consisted of the following:
|  | March 31, 2019 |  |  | December 31, 2018 |
Principal amount of long-term debt |  | $ | 19,546 |  |  | $ | 10,000 |
Less: Current portion of long-term debt |  |  | (5,298 | ) |  |  | (1,687 | )
Long-term debt, net of current portion |  |  | 14,248 |  |  |  | 8,313 |
Debt discount, net of accretion |  |  | (1,019 | ) |  |  | (226 | )
Cumulative accretion of final payment due at maturity |  |  | 136 |  |  |  | 58 |
Long-term debt, including accretion, net of current portion |  | $ | 13,365 |  |  | $ | 8,145 |
Schedule of Future Principal Payments and the Final Payments Due | As of March 31, 2019, future principal payments and the final payment due under the Company’s loan agreements were as follows:
Year Ending December 31, |  | Hercules |  |  | FFG |  |  | Total |
2019 |  | $ | 1,345 |  |  | $ | 2,914 |  |  | $ | 4,259 |
2020 |  |  | 4,305 |  |  |  | 4,462 |  |  |  | 8,767 |
2021 |  |  | 4,350 |  |  |  | 2,170 |  |  |  | 6,520 |
Long-term debt |  | $ | 10,000 |  |  | $ | 9,546 |  |  | $ | 19,546 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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