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Financial Instruments and Fair Value Measurements
9 Months Ended
Sep. 30, 2021
Financial Instruments and Fair Value Measurements  
Financial Instruments and Fair Value Measurements

3. Financial Instruments and Fair Value Measurements

Financial assets and liabilities measured at fair value are summarized below:

As of September 30, 2021

Significant

Quoted Priced in

Significant Other

Unobservable

Active Markets

Observable Inputs

Inputs

    

(Level 1)

    

(Level 2)

    

(Level 3)

    

Total

Assets:

 

  

 

  

 

  

 

  

Money market funds

$

7,252

$

$

$

7,252

Total assets

$

7,252

$

$

$

7,252

Liabilities:

 

  

  

  

  

Simple Agreements for Future Equity

$

$

$

10,918

$

10,918

Total liabilities

$

$

$

10,918

$

10,918

As of December 31, 2020

Significant

Quoted Priced in

Significant Other

Unobservable

Active Markets

Observable Inputs

Inputs

    

(Level 1)

    

(Level 2)

    

(Level 3)

    

Total

Assets:

 

  

 

  

 

  

 

  

Money market funds

$

2,853

$

$

$

2,853

Total assets

$

2,853

$

$

$

2,853

Liabilities:

 

  

 

  

 

  

 

  

Derivative liability

$

$

$

2,209

$

2,209

Total liabilities

$

$

$

2,209

$

2,209

The following table sets forth a summary of the changes in fair value of the Level 3 liabilities for the nine months ended September 30, 2021 and 2020:

Nine Months Ended September 30, 2021

Derivative

    

    

SAFE

    

Liability

    

Total

Balance at December 31, 2020

$

$

2,209

$

2,209

Change in the fair value of the warrant liability

 

 

 

Fair value recognized upon the issuance of SAFE

 

8,942

 

 

8,942

Change in the fair value of the liability

 

1,976

 

(2,209)

 

(233)

Balance at September 30, 2021

$

10,918

$

$

10,918

Nine Months Ended September 30, 2020

Warrant

Derivative

    

    

Liability

    

Liability

    

Total

Balance at December 31, 2019

$

181

$

1,493

$

1,674

Change in the fair value of the warrant liability

 

 

 

Fair value recognized upon the issuance of Convertible Notes

 

 

718

 

718

Change in the fair value of the liability

 

(33)

 

(135)

 

(168)

Balance at September 30, 2020

$

148

$

2,076

$

2,224

Derivative Liability — The Company recognizes derivative liabilities as a result of the issuance of the convertible notes that contain conversion and redemption features that are required to be bifurcated. The fair value measurement of the derivative liability is classified as Level 3 under the fair value hierarchy as it has been valued using certain unobservable inputs. These inputs include: (1) probability of occurrence of future events (such as a qualified financing or a sale), and (2) discount rate for implied return required by investor. Significant increases or decreases in any of those inputs in isolation could result in a significantly lower or higher fair value measurement.

The fair value of the derivative liability was determined by calculating the fair value of the notes with the conversion and redemption features as compared to the fair value of the notes without such features, with the difference representing the value of the conversion and redemption features, or the derivative liability. The conversion and redemption features are measured at fair value as of each reporting date and the change in the fair value for the period is recorded in the consolidated statements of operations as a change in the fair value of the derivative liability. The fair value of the derivative liability is based on Level 3 unobservable inputs. Changes in fair value are recognized as a gain or loss within other income (expense) on the consolidated statements of operations and comprehensive loss. The derivative liability expired unexercised upon the conversion of the convertible notes into Series B-1 Convertible Preferred Stock in May of 2021 (Note 7).

Warrant Liability — The Company issued 180,724 Series A-1 preferred stock warrants in December 2010. The Company recorded a change in fair value adjustment of $1 and $33 in the consolidated statement of operations and comprehensive loss for the three and nine months ended September 30, 2020, respectively. The warrants expired unexercised in October 2020.

Simple Agreements for Future Equity — On March 25, 2021, the Company entered into SAFEs with existing investors, pursuant to which the Company received gross proceeds in an aggregate amount equal to $8,942. The fair value of the SAFE liability is estimated using a fair value model that includes inputs such as: (1) probability of occurrence of future events (such as a change of control or public offering), and (2) discount rate for implied return required by investor. The Company recorded a change in fair value adjustment of $932 and $1,976 in the consolidated statement of operations and comprehensive loss for the three and nine months ended September 30, 2021, respectively.

The fair value of the SAFEs was determined using a probability weighted expected return method (PWERM), in which the probability and timing of potential future events is considered in order to estimate the fair value of the SAFEs as of each valuation date. Management determined the fair value of the SAFEs using the following significant unobservable inputs:

March 25,

September 30, 

2021

    

2021

(Issuance)

Expected term (in years)

 

0.02

0.35

Discount upon conversion

 

20.0%

20.0%

Discount upon implied return

 

18.9%

18.9%

Probability of initial public offering occurrence

 

90.0%

45.0%

Probability of dissolution event occurrence

2.0%

15.0%

Probability of equity financing occurrence

7.0%

37.0%

Probability of change of control occurrence

1.0%

3.0%

In addition, the Company recorded the Series B-1 convertible preferred stock within mezzanine equity at fair value on the date of issuance, May 1, 2021 (Note 7). This non-recurring fair value measure was based on level 3 unobservable inputs.