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Long-Term Debt (Tables)
3 Months Ended
Mar. 31, 2025
Debt Disclosure [Abstract]  
Fair Value Measurement Inputs and Valuation Techniques
The following table summarizes the significant unobservable inputs used in the fair value measurement of the Royalty Right Agreements:
Valuation MethodologySignificant Unobservable InputWeighted Average (range, if applicable)
Discount Rate15%
Royalty Right AgreementsProbability weighted
income approach
Probability of Success75%
Projected Years of Payments2025-2034
Schedule of Long-Term Debt Instruments
Long-term notes and unamortized debt discount balances are as follows:
 March 31,December 31,
 20252024
Total outstanding notes
$45,000 $45,000 
Unamortized discount, including Exit Fee
(11,392)(12,646)
Notes payable, long-term
33,608 32,354 
Finance lease, long-term
138 146 
Notes payable, net
$33,746 $32,500 
 March 31,December 31,
 20252024
Royalty obligations
$56,917 $56,922 
Unamortized discount(35,269)(36,706)
Current portion of royalty obligation(89)(87)
Royalty obligations, net
$21,559 $20,129 
Debt Maturity
Scheduled principal payments on the 13.5% Notes as of March 31, 2025 are as follows:
2025 
20269,540 
202714,535 
202820,925 
Total$45,000