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CONVERTIBLE NOTES AND OTHER DEBTS (Tables)
 12 Months Ended
Dec. 31, 2022
Debt Disclosure [Abstract]  
Schedule of Convertible Interest Expense Recognized
The following table presents interest expense recognized for the 2022 Notes:
(in thousands)Year ended December 31,
202220212020
Contractual interest expense$1,511 $1,648 $953 
Amortization of debt discount— 685 373 
Amortization of debt issuance costs257 214 117 
Total interest expense recognized$1,768 $2,547 $1,443 
The following table presents interest expense recognized for the 2024 Notes:
Year ended December 31,
(in thousands)202220212020
Contractual interest expense$2,312 $2,312 $2,310 
Amortization of debt discount— 4,718 4,358 
Amortization of debt issuance costs874 641 595 
Total interest expense recognized$3,186 $7,671 $7,263 
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)20222021
Liability:
Principal amount$115,500 $115,500 
Less: Debt discount, net of amortization— (14,576)
Less: Debt issuance costs, net of amortization(1,519)(1,983)
Carrying amount$113,981 $98,941 
Remaining amortization period (years)n/a2.7
Effective interest rate on liability componentn/a7.95 %
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)20222021
Financing from French government agencies related to various government incentive programs (1)
$10,580 $12,259 
Relief loans (2)
5,337 5,651 
Term loans— 71 
Total debt obligations15,917 17,981 
Less: current portion(4,756)(4,992)
Long-term portion$11,161 $12,989 
(1) These loans bear variable interest rate at EURIBOR 1 month plus 1.9% and mature between 2023 through 2025.
(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, 2022 (in thousands):
Year ending December 31,
2023$4,756 
20244,756 
20255,065 
20261,340 
Total$15,917