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Interest Expense and Other | 12 Months Ended
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Dec. 31, 2021
Other Income and Expenses [Abstract] |
Interest Expense and Other |
12. | INTEREST EXPENSE AND OTHER
Interest expense and other for the years ended December 31, 2021 and 2020 consisted of the following (in thousands):
|  | Year ended December 31, |
|  | 2021 |  |  | 2020 |
Interest on term loan debt |  | $ | 630 |  |  | $ | 200 |
Interest on PPP loan |  |  | 11 |  |  |  | 16 |
Interest on convertible note |  |  | 700 |  |  |  | 359 |
Amortization of debt issuance costs |  |  | 725 |  |  |  | 97 |
Amortization of debt discount |  |  | 752 |  |  |  | 830 |
Amortization of premiums on marketable securities, net |  |  | 456 |  |  |  | — |
Common stock purchase agreement costs |  |  | 1,583 |  |  |  | — |
Interest expense and other |  | $ | 4,857 |  |  | $ | 1,502 |

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- Definition The entire disclosure for the components of non-operating income or non-operating expense, including, but not limited to, amounts earned from dividends, interest on securities, gain (loss) on securities sold, equity earnings of unconsolidated affiliates, gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 + Details
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