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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2025
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
The following tables present the fair value hierarchy for assets and liabilities measured at fair value on a recurring basis (in thousands):
As of March 31, 2025
Level 1Level 2Level 3Total
Cash and cash equivalents:
Money market funds$24,338 $— $— $24,338 
Corporate debt securities— 10,747 — 10,747 
U.S. government securities— 2,993 — 2,993 
U.S. government agency bonds— 2,747 — 2,747 
Term deposits (less than 90 days)— 6,771 — 6,771 
Payment-dependent notes receivable— — 7,433 7,433 
Short term investments:
Corporate debt securities— 6,849 — 6,849 
U.S. government securities— 12,160 — 12,160 
U.S. government agency bonds— 2,499 — 2,499 
Term deposits(1)
— 1,075 — 1,075 
Total financial assets$24,338 $45,841 $7,433 $77,612 
Payment-dependent notes payable$— $— $7,433 $7,433 
December 2023 Warrants— — 
Total financial liabilities$— $$7,433 $7,434 
As of December 31, 2024
Level 1Level 2Level 3Total
Cash and cash equivalents:
Money market funds$56,300 $— $— $56,300 
U.S. government securities21,482 — — 21,482 
Term deposits (less than 90 days)— 7,306 — 7,306 
Payment-dependent notes receivable— — 7,412 7,412 
Term deposits(1)
— 1,068 — 1,068 
Total financial assets$77,782 $8,374 $7,412 $93,568 
Payment-dependent notes payable$— $— $7,412 $7,412 
December 2023 Warrants— 45 — 45 
Private Placement Warrants— — 147 147 
Total financial liabilities$— $45 $7,559 $7,604 

(1) Included in prepaid expenses and other current assets on the unaudited condensed consolidated balance sheets as of March 31, 2025 and December 31, 2024.
Fair Value Measurement Inputs and Valuation Techniques
The Company estimated the fair value of the Private Placement Warrant liabilities as of March 31, 2025 and December 31, 2024, respectively, using the following key assumptions:
As of March 31,
2025
As of December 31,
2024
Fair value of underlying securities$0.56 $0.93 
Expected term (years)2.0 2.2 
Expected volatility85.0 %82.5 %
Risk-free interest rate3.9 %4.3 %
Expected dividend yield— %— %
Fair value per warrant$— $0.02 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
The Company recorded changes in the fair value of the Private Placement Warrants as follows (in thousands):
For the three months ended March 31,
20252024
Balance, January 1$147 $4,727 
Change in fair value of warrant liability(1)
(147)(1,625)
Balance, March 31$— $3,102 

(1) The change in fair value of warrant liability is recorded in the unaudited condensed consolidated statement of operations within Gain (loss) from change in fair value of warrant liabilities.
The following table provides a reconciliation for all financial assets and liabilities measured at fair value using significant unobservable inputs (Level 3) for the three months ended March 31, 2025 and 2024 (in thousands):

Total Level 3 Financial AssetsTotal Level 3 Financial Liabilities
Balance as of December 31, 2024$7,412 7,559 
Change in fair value of payment-dependent notes receivable21 — 
Change in fair value of Private Placement Warrants — (147)
Change in fair value of payment-dependent notes payable— 21 
Balance as of March 31, 2025$7,433 $7,433 


Total Level 3 Financial AssetsTotal Level 3 Financial Liabilities
Balance as of December 31, 2023$5,593 $10,320 
Change in fair value of payment-dependent notes receivable643 — 
Change in fair value of Private Placement Warrants— (1,625)
Change in fair value of payment-dependent notes payable— 643 
Balance as of March 31, 2024$6,236 $9,338 
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
The following table provides a reconciliation for all financial assets and liabilities measured at fair value using significant unobservable inputs (Level 3) for the three months ended March 31, 2025 and 2024 (in thousands):

Total Level 3 Financial AssetsTotal Level 3 Financial Liabilities
Balance as of December 31, 2024$7,412 7,559 
Change in fair value of payment-dependent notes receivable21 — 
Change in fair value of Private Placement Warrants — (147)
Change in fair value of payment-dependent notes payable— 21 
Balance as of March 31, 2025$7,433 $7,433 


Total Level 3 Financial AssetsTotal Level 3 Financial Liabilities
Balance as of December 31, 2023$5,593 $10,320 
Change in fair value of payment-dependent notes receivable643 — 
Change in fair value of Private Placement Warrants— (1,625)
Change in fair value of payment-dependent notes payable— 643 
Balance as of March 31, 2024$6,236 $9,338