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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2024
Fair Value Disclosures [Abstract]  
Summary of Financial Instruments Measured on a Recurring Basis The following table summarizes the conclusions reached as of March 31, 2024 and December 31, 2023 for financial instruments measured at fair value on a recurring basis (in thousands):

 

 

 

 

 

Fair Value Hierarchy Classification

 

 

 

Balance

 

 

Quoted
Prices in
Active
Markets for
Identical
Assets
(Level 1)

 

 

Significant
Other
Observable
Inputs
(Level 2)

 

 

Significant
Unobservable
Inputs (Level 3)

 

March 31, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Cash

 

$

854

 

 

$

854

 

 

 

 

 

 

 

Restricted cash

 

 

543

 

 

 

543

 

 

 

 

 

 

 

Money market funds

 

 

34,628

 

 

 

34,628

 

 

 

 

 

 

 

Total assets

 

$

36,025

 

 

$

36,025

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Warrant liabilities

 

$

12,202

 

 

 

 

 

 

 

 

$

12,202

 

Derivative liability

 

 

28

 

 

 

 

 

 

 

 

 

28

 

Total liabilities

 

$

12,230

 

 

 

 

 

 

 

 

$

12,230

 

 

 

 

 

 

 

 

 

 

 

 

 

 

December 31, 2023

 

 

 

 

 

 

 

 

 

 

 

 

Cash

 

$

767

 

 

$

767

 

 

 

 

 

 

 

Restricted cash

 

 

543

 

 

 

543

 

 

 

 

 

 

 

Money market funds

 

 

33,283

 

 

 

33,283

 

 

 

 

 

 

 

Total assets

 

$

34,593

 

 

$

34,593

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Warrant liabilities

 

$

21,810

 

 

 

 

 

 

 

 

$

21,810

 

Derivative liability

 

 

196

 

 

 

 

 

 

 

 

 

196

 

Total liabilities

 

$

22,006

 

 

 

 

 

 

 

 

$

22,006

 

Summary of Reconciliation of Beginning and Ending Balances for Liabilities Measured at Fair Value on Recurring Basis

A reconciliation of the beginning and ending balances for liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) is as follows (in thousands):

 

 

 

Warrant Liabilities

 

Balance – December 31, 2023

 

 

$

21,810

 

Gain adjustment to fair value

 

 

 

(9,608

)

Balance – March 31, 2024

 

 

$

12,202

 

 

 

 

 

 

 

 

 

Derivative Liability

 

Balance – December 31, 2023

 

 

$

196

 

Gain adjustment to fair value

 

 

 

(168

)

Balance – March 31, 2024

 

 

$

28