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DEBT OBLIGATIONS (Tables)
12 Months Ended
Dec. 31, 2022
Debt Disclosure [Abstract]  
Schedule of debt obligations
The Company’s current and non-current portions of long-term debt were as follows:
December 31,
(in thousands)20222021
Long-term debt
Convertible Notes due 2026$690,000 $690,000 
Less: Unamortized debt issuance costs(11,556)(15,073)
Long-term debt, net of current portion$678,444 $674,927 
Long-term debt to related party
Offtake Advances$— $16,599 
Less: Unamortized debt discount— (517)
Net carrying amount— 16,082 
Less: Current installments of long-term debt to related party— (16,082)
Long-term debt to related party, net of current portion$— $— 
The current and non-current portions of the equipment notes, which are included within the Consolidated Balance Sheets in “Other current liabilities” and “Other non-current liabilities,” respectively, were as follows:
December 31,
(in thousands)20222021
Equipment notes
Current$2,392 $2,566 
Non-current4,743 7,095 
$7,135 $9,661 
Interest expense, net
Interest expense related to the Convertible Notes was as follows:
For the year ended December 31,
(in thousands)202220212020
Coupon interest$1,725 $1,318 $— 
Amortization of debt issuance costs3,517 2,675 — 
Convertible Notes interest expense$5,242 $3,993 $— 
Interest expense, net, was as follows:
For the year ended December 31,
(in thousands)202220212020
Interest expense$6,146 $9,168 $5,171 
Interest capitalized to property, plant and equipment, net(360)(264)(162)
Interest expense, net$5,786 $8,904 $5,009 
Debt maturities
The following is a schedule of debt repayments as of December 31, 2022:
(in thousands)Convertible NotesEquipment Notes
Year ending December 31,
2023$— $2,392 
2024— 2,106 
2025— 2,098 
2026690,000 539 
2027— — 
Thereafter— — 
Total minimum payments$690,000 $7,135