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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Summary of Assets and Liabilities Measured at Fair Value

The following table sets forth by level, within the fair value hierarchy, the Company's assets and liabilities at fair value as of December 31, 2023:

 

 

December 31, 2023

 

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

Assets

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

$

11,171

 

 

$

 

 

$

 

 

$

11,171

 

U.S. treasury bills

 

 

5,942

 

 

 

 

 

 

 

 

 

5,942

 

Certificates of deposit

 

 

983

 

 

 

 

 

 

 

 

 

983

 

Total assets

 

$

18,096

 

 

$

 

 

$

 

 

$

18,096

 

 

 

 

 

 

 

 

 

 

 

 

 

Liabilities

 

 

 

 

 

 

 

 

 

 

 

 

Warrant derivative liabilities

 

$

 

 

$

 

 

$

8,457

 

 

$

8,457

 

Total liabilities

 

$

 

 

$

 

 

$

8,457

 

 

$

8,457

 

Summary of Financial Assets Measured at Fair Value on Recurring Basis

The fair value of the Company's financial assets that are measured at fair value on a recurring basis as of December 31, 2023 are as follows:

 

 

December 31, 2023

 

 

 

Amortized Cost

 

 

Unrealized Gains

 

 

Unrealized Losses

 

 

Fair Value

 

Cash equivalents

 

 

 

 

 

 

 

 

 

 

 

 

  Money market funds

 

$

11,171

 

 

$

 

 

$

 

 

$

11,171

 

  U.S. treasury bills

 

 

2,989

 

 

 

1

 

 

 

 

 

 

2,990

 

Short-term investments

 

 

 

 

 

 

 

 

 

 

 

 

  U.S. treasury bills

 

 

2,952

 

 

 

 

 

 

 

 

 

2,952

 

  Certificates of deposit

 

 

490

 

 

 

1

 

 

 

 

 

 

491

 

Long-term investments

 

 

 

 

 

 

 

 

 

 

 

 

  Certificates of deposit

 

 

490

 

 

 

2

 

 

 

 

 

 

492

 

Total

 

$

18,092

 

 

$

4

 

 

$

 

 

$

18,096

 

Summary of Changes In The Fair Value of Warrant Liabilities

The change in fair value of warrant liabilities measured on a recurring basis using unobservable Level 3 inputs for the year ended December 31, 2023 is set forth below:

 

 

 

 

 

 

 

 

Fair Value at

 

 

 

Fair Value at

 

 

Change in

 

 

December 31,

 

 

 

May 18, 2023

 

 

Fair Value

 

 

2023

 

Series A Warrant

 

$

2,971

 

 

$

1,491

 

 

$

4,462

 

Series B Warrant

 

 

2,634

 

 

 

1,361

 

 

 

3,995

 

Total warrant liabilities

 

$

5,605

 

 

$

2,852

 

 

$

8,457