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Debt (Tables) | 3 Months Ended
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Mar. 31, 2019
Debt Disclosure [Abstract] |
Debt | Debt at March 31, 2019, consisted of the following (in thousands):
|  | March 31, 2019 |
|  | Principal |  |  | Unamortized Discount |  |  | Total |
Term Loan Credit Agreement |  | $ | 40,000 |  |  | $ | (567 | ) |  | $ | 39,433 |
Less: debt – current |  |  | — |  |  |  | — |  |  |  | — |
Debt – non-current |  | $ | 40,000 |  |  | $ | (567 | ) |  | $ | 39,433 |
Debt at December 31, 2018, consisted of the following (in thousands):
|  | December 31, 2018 |
|  | Principal |  |  | Unamortized Discount |  |  | Net Carrying Value |
Oxford Term Loan Agreement |  | $ | 30,000 |  |  | $ | (130 | ) |  | $ | 29,870 |
Less: debt – current |  |  | (7,857 | ) |  |  | — |  |  |  | (7,857 | )
Debt – non-current |  | $ | 22,143 |  |  | $ | (130 | ) |  | $ | 22,013 |
Expected Principal, Interest and Fee Payments on Debt | Principal, interest and fee payments on debt at March 31, 2019, are expected to be as follows (in thousands):
Year ended December 31, |  | Principal |  |  | Interest and Fees |  |  | Total |
2019 |  | $ | — |  |  | $ | 2,250 |  |  | $ | 2,250 |
2020 |  |  | — |  |  |  | 3,335 |  |  |  | 3,335 |
2021 |  |  | — |  |  |  | 3,326 |  |  |  | 3,326 |
2022 |  |  | 15,000 |  |  |  | 2,909 |  |  |  | 17,909 |
2023 |  |  | 20,000 |  |  |  | 1,315 |  |  |  | 21,315 |
2024 |  |  | 5,000 |  |  |  | 1,270 |  |  |  | 6,270 |
Total |  | $ | 40,000 |  |  | $ | 14,405 |  |  | $ | 54,405 |

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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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