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Long-Term Debt and Other Financings (Tables) | 9 Months Ended
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Sep. 30, 2020
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 September 30, 2020, are as follows (in thousands): ​
​ | ​ | ​ | ​
​ | ​ | ​ | September 30,
​ | ​ | ​ | 2020
2020 (excluding nine months ended September 30, 2020) | ​ | $ | 2,270
2021 | ​ | ​ | 8,534
2022 | ​ | ​ | 21,200
Thereafter | ​ | ​ | —
Total payments | ​ | ​ | 32,004
Less: interest, final payment fees, discount and issuance costs | ​ | ​ | (2,052)
Total payments, net of interest, final payment fees, discount and issuance costs | ​ | ​ | 29,952
Less: current portion of long-term debt | ​ | ​ | (8,962)
Long-term debt |  | $ | 20,990
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 condensed consolidated statements of operations and comprehensive (loss) income relates to the following debt instruments (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, | ​ | Nine Months Ended September 30,
​ |  | 2020 |  | 2019 |  | 2020 |  | 2019
SVB loans | ​ | $ | 334 | ​ | $ | 314 | ​ | $ | 1,073 | ​ | $ | 791
Novartis note | ​ |  | 100 | ​ |  | 168 | ​ |  | 409 | ​ |  | 540
Other | ​ |  | — | ​ |  | 2 | ​ |  | 2 | ​ |  | 5
Total interest expense | ​ | $ | 434 | ​ | $ | 484 | ​ | $ | 1,484 | ​ | $ | 1,336

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- Definition Tabular disclosure of maturity and sinking fund requirement for long-term debt. + 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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