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Convertible Notes (Tables) | 12 Months Ended
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Dec. 31, 2021
Debt Disclosure [Abstract] |
Convertible Debt | The carrying value of the convertible notes, which approximates fair value, for the year ended December 31, 2020, consisted of the following (in thousands):
| December 31, 2020
Convertible notes, current portion | $ | 21,540 |
Debt discount recognized | (4,884) |
Debt discount amortized | 1,704 |
Net convertible notes, current portion | $ | 18,360 |

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