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CONVERTIBLE NOTES AND OTHER DEBTS (Tables) | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Schedule of Convertible Debt Interest | The following table presents interest expense recognized for the 2022 Notes:
(in thousands) | Year Ended December 31,
| 2023 |  | 2022 |  | 2021
Contractual interest expense | $ | — |  |  | $ | 1,511 |  |  | $ | 1,648 |
Amortization of debt discount | — |  |  | — |  |  | 685 |
Amortization of debt issuance costs | — |  |  | 257 |  |  | 214 |
Total interest expense recognized | $ | — |  |  | $ | 1,768 |  |  | $ | 2,547 |
The following table presents interest expense recognized for the 2024 Notes:
| Year Ended December 31,
(in thousands) | 2023 |  | 2022 |  | 2021
Contractual interest expense | $ | 2,312 |  |  | $ | 2,312 |  |  | $ | 2,312 |
Amortization of debt discount | — |  |  | — |  |  | 4,718 |
Amortization of debt issuance costs | 898 |  |  | 874 |  |  | 641 |
Total interest expense recognized | $ | 3,210 |  |  | $ | 3,186 |  |  | $ | 7,671 |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments | The following table presents the components of the 2024 Notes:
| As of December 31,
(in thousands, except for years and percentages) | 2023 |  | 2022
Liability: |  |  |
Principal amount | $ | 115,500 |  |  | $ | 115,500 |
Less: Debt issuance costs, net of amortization | (620) |  |  | (1,519) |
Carrying amount | $ | 114,880 |  |  | $ | 113,981 |
Schedule of Debt | The Company has a variety of debt and credit facilities primarily in France to satisfy the financing requirements of the operations of its French subsidiary. These arrangements are summarized in the table below:
| December 31,
(in thousands) | 2023 |  | 2022
Financing from French government agencies related to various government incentive programs (1) | $ | 11,268 |  |  | $ | 10,580 |
Relief loans (2) | 4,145 |  |  | 5,337 |
Total debt obligations | 15,413 |  |  | 15,917 |
Less: current portion | (4,918) |  |  | (4,756) |
Long-term portion | $ | 10,495 |  |  | $ | 11,161 |
(1) These loans bear variable interest rate at EURIBOR 1 month plus 1.9% and mature between 2024 through 2026. (2) Refer to the below section “Relief Loans” for the description of these loans.
Schedule of Future Minimum Repayments of Other Debts | The table below presents the future minimum repayments of other debts as of December 31, 2023 (in thousands):
Year ending December 31, |
2024 | $ | 4,918 |
2025 | 5,238 |
2026 | 5,257 |
Total | $ | 15,413 |

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