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Fair value of financial assets and liabilities (Tables)
9 Months Ended
Sep. 30, 2021
Fair value of financial assets and liabilities  
Schedule of information about the Company's financial assets and liabilities measured at fair value on a recurring basis

The following tables present information about the Company’s financial assets and liabilities measured at fair value on a recurring basis and indicate the level of the fair value hierarchy used to determine such fair values (in thousands):

    

Fair value measurements as of September 30, 2021

    

Level 1

    

Level 2

    

Level 3

    

Total

Assets

  

 

  

 

  

 

  

Cash equivalents

$

212,833

$

$

$

212,833

$

212,833

$

$

$

212,833

    

Fair value measurements at December 31, 2020

    

Level 1

    

Level 2

    

Level 3

    

Total

Assets

  

 

  

 

  

 

  

Cash equivalents

$

23,456

$

$

$

23,456

Short-term investments

 

14,998

 

 

 

14,998

$

38,454

$

$

$

38,454

Liabilities

 

  

 

  

 

  

 

Preferred stock warrant liability

$

$

$

4,117

$

4,117

$

$

$

4,117

$

4,117

Schedule of information about weighted average of the unobservable inputs used to fair value the preferred stock warrant liability

The table below quantifies the weighted average of the unobservable inputs used to fair value the preferred stock warrant liability prior to their conversion into common stock warrants:

    

Three Months Ended September 30, 

 

    

Nine Months Ended September 30, 

 

    

2021

    

2020

 

    

2021

    

2020

 

Fair value of Series A1 preferred stock

$

4.00

$

0.39

$

3.01

$

0.45

Fair value of Series B1 preferred stock

$

4.00

$

1.17

$

3.26

$

1.13

Fair value of Series C1 preferred stock

$

4.00

$

1.15

$

3.30

$

1.15

Remaining contractual term (in years)

 

6.6

 

7.4

 

6.8

 

7.7

Risk-free interest rate

 

1.0

%  

 

0.6

%

 

1.2

%  

 

0.6

%

Expected dividend yield

 

%  

 

%

 

%  

 

%

Expected volatility

 

42.2

%  

 

40.3

%

 

42.0

%  

 

39.3

%

Schedule of information provides a rollforward of the aggregate fair values of the Company's preferred stock warrant liability

The following table provides a rollforward of the aggregate fair values of the Company’s preferred stock warrant liability, for which fair values are determined using Level 3 inputs (in thousands):

    

Three Months Ended September 30, 

    

Nine Months Ended September 30, 

    

2021

    

2020

    

2021

    

2020

Balance, beginning of period

$

15,600

$

3,499

$

4,117

$

3,396

Initial fair value of Series C1 preferred stock warrants

652

Change in fair value of preferred stock warrants

 

8,160

 

 

19,643

 

(549)

Conversion of preferred stock warrants to common stock warrants

 

(23,760)

 

 

(23,760)

 

Balance, end of period

$

$

3,499

$

$

3,499