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Long-Term Debt and Other Financings (Tables) | 12 Months Ended
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Dec. 31, 2019
Long-Term Debt and Other Financings |
Aggregate Future Principal, Final Payment Fees and Discounts of Long-Term Debt | Aggregate future principal, final payment fees and discounts of the Company’s long-term debt as of December 31, 2019, are as follows (in thousands):
Year ending December 31, 2020 |  | $ | 6,030
Year ending December 31, 2021 |  |  | 8,551
Year ending December 31, 2022 |  |  | 21,801
Thereafter |  |  | —
Total payments |  |  | 36,382
Less: interest, final payment fees, discount and issuance costs |  |  | (4,105)
Total payments, net of interest, final payment fees, discount and issuance costs |  |  | 32,277
Less: current portion of long-term debt |  |  | (5,184)
Long-term debt |  | $ | 27,093
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 for the years ended December 31, 2019 and 2018, relates to the following debt instruments (in thousands):
|  | Year Ended December 31,
|  | 2019 |  | 2018
SVB loan |  | $ | 1,207 |  | $ | 258
Novartis note |  |  | 706 |  |  | 627
Other |  |  | 6 |  |  | 37
Total interest expense |  | $ | 1,919 |  | $ | 922

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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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