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CONVERTIBLE NOTES (Tables)
12 Months Ended
Dec. 31, 2024
Debt Disclosure [Abstract]  
Schedule of Long-Term Debt
The carrying value of the 16.00% Notes consisted of the following at December 31, 2024 (in thousands):

Principal$15,960 
Accretion of exit premium1,204 
Unamortized debt issuance costs(652)
Net carrying amount$16,512 
As of December 31, 2024 and 2023, the convertible note obligations were classified as follows in the consolidated balance sheets (in thousands):
20242023
2.50% Notes
$— $726 
  5.00% Notes
$46,839 $36,102 
Total convertible notes$46,839 $36,828 
Current portion of convertible notes$— $726 
Convertible notes, non-current$46,839 $36,102 
Schedule of Interest Expense
Interest expense related to the Company’s 16.00% Note obligation consisted of the following for the year ended December 31, 2024 (in thousands):
Contractual coupon interest$961 
Amortization of premium, discount and issuance costs, net1,320 
Total interest expense$2,281 
Interest expense related to the Company’s convertible note obligations consisted of the following for the years ended December 31 (in thousands):

20242023
Contractual coupon interest$3,433 $2,425 
Amortization of premium, discount and issuance costs, net
7,360 3,278 
Total interest expense on convertible notes$10,793 $5,703 
Schedule of Gain (Loss) on Extinguishment
Gain (loss) on extinguishment of exchanged convertible notes was as follows for the years ended December 31 (in thousands):

20242023
(Loss) gain on extinguishment$— $(6,499)
Schedule of Convertible Notes
The carrying value of the 2.50% Notes was included in current portion of convertible notes and consisted of the following at December 31 (in thousands):

20242023
Outstanding principal$— $726 
Unamortized debt issuance— — 
Net carrying amount$— $726 
The carrying value of the 5.00% Notes consisted of the following at December 31 (in thousands):

20242023
Outstanding principal at par$70,974 $67,634 
Unamortized debt premium4,140 5,408 
Unamortized debt discount(26,229)(34,267)
Unamortized debt issuance costs(2,046)(2,673)
Net carrying amount$46,839 $36,102 
Schedule of Derivative Financial Instrument Activity The derivative financial instrument activity for the year ended December 31, 2023 is comprised of the following (in thousands):
Beginning balance$— 
Initial measurement38,160 
Reduction as a result of conversion of 5.00% Notes
(380)
Change in value - gain(10,872)
Reclassification to contributed capital(26,908)
Ending balance$— 
Schedule of Significant Inputs used to Estimate Fair Value The following table summarizes the significant inputs used to estimate the fair value of the 5.00% Notes as of December 31, 2024, December 31, 2023 and the June 9, 2023 issuance date:
December 31,June 9,
202420232023
Coupon rate5.00%5.00%5.00%
Term (years)2.03.03.5
Volatility42.00%55.00%55.00%
Risk-free rate4.30 %4.02 %4.15 %
Discount yield24.80 %25.00 %25.00 %
Discount factor65.00%50.00%44.00%
The following table summarizes the significant inputs used to estimate the fair value of the Conversion Option as of October 17, 2023 and June 9, 2023:
October 17,June 9,
20232023
Stock price$5.94$7.40
Initial conversion price$7.20$7.20
Conversion cap$8.30$8.30
Term (years)3.23.5
Time to call (years)1.72.0
Volatility55.00 %55.00 %
Risk-free rate5.00 %4.15 %
Discount yield25.00 %25.00 %
The following table summarizes the significant inputs used to estimate the fair value of the Schuler Purchase Obligation as of December 31, 2023 and June 9, 2023:
December 31,June 9,
20232023
Stock price$3.92$7.40
Exercise price$7.20$7.20
Term (years)0.130.52
Volatility55.00 %55.00 %
Risk-free rate5.55 %5.38 %
Fixed commitment purchase price (in thousands)$10,000$10,000
Number of shares1,387,9491,387,949
Obligation probability75%100%
The following table summarizes the significant inputs used to estimate the fair value of the Common Warrant liability as of December 31, 2024 and January 23, 2024:

December 31, 2024January 23, 2024
Exercise price$1.65 $1.65 
Term (years)4.15.0
Volatility59.00 %55.00 %
Risk-free rate4.37 %4.06 %
Dividend yield0.00 %0.00 %