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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Summary of Financial Instruments Measured at Fair Value on a Recurring Basis

The following tables set forth the Company’s financial instruments that were measured at fair value on a recurring basis by level within the fair value hierarchy:

 

 

 

December 31, 2021

 

(in thousands)

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

Cash equivalents (money market funds)

 

$

797,448

 

 

$

 

 

$

 

 

$

797,448

 

Totals

 

$

797,448

 

 

$

 

 

$

 

 

$

797,448

 

 

 

 

December 31, 2020

 

(in thousands)

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

Cash equivalents (money market funds)

 

$

314,636

 

 

$

 

 

$

 

 

$

314,636

 

Totals

 

$

314,636

 

 

$

 

 

$

 

 

$

314,636

 

Level 3  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Summary of Fair Value of Series B Preferred Stock Tranche Rights Liability

The fair value of the Series B Preferred Stock tranche rights liability was estimated using a probability-weighted present value of the benefit of investment with the following significant unobservable inputs (Level 3):

 

 

 

March 23, 2020
(Tranche 3
settlement)

 

Implied equity value (in millions)

 

$

208.2

 

Probability of success of reaching necessary
   milestone:

 

 

 

Tranche 2 milestone

 

N/A

 

Tranche 3 milestone (by March 31, 2020)

 

 

90

%

Expected industry return over period during
   which milestones are expected to be
   achieved

 

 

13.0

%

Risk-free interest rate

 

 

1.1

%

Summary of Changes in Level 3 Liabilities Measures at Fair Value on a Recurring Basis

The following table presents changes during the year ended December 31, 2020 in Level 3 liabilities measured at fair value on a recurring basis:

 

(in thousands)

 

Preferred
Stock
Tranche
Rights
Liability

 

Balances at January 1, 2020

 

$

5,400

 

Change in estimated fair value

 

 

(1,265

)

Settlement of tranche right

 

 

(4,135

)

Balances at December 31, 2020

 

$