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Available-for-Sale Securities (Tables)
 12 Months Ended
Dec. 31, 2021
Investments Debt And Equity Securities [Abstract]  
Summary of Available-for-Sale Securities Held

The following tables summarize the available-for-sale securities held at December 31, 2021 and 2020 (in thousands):

 

December 31, 2021

 

Amortized cost

 

 

Gross unrealized

gains

 

 

Gross unrealized

losses

 

 

Fair Value

 

Commercial paper

 

$

106,298

 

 

$

8

 

 

$

(29

)

 

$

106,277

 

Corporate debt securities

 

 

5,876

 

 

 

—

 

 

 

(3

)

 

 

5,873

 

U.S. government agency securities and treasuries

 

 

8,062

 

 

 

—

 

 

 

(21

)

 

 

8,041

 

Total

 

$

120,236

 

 

$

8

 

 

$

(53

)

 

$

120,191

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

December 31, 2020

 

Amortized cost

 

 

Gross unrealized

gains

 

 

Gross unrealized

losses

 

 

Fair Value

 

Commercial paper

 

$

40,467

 

 

$

11

 

 

$

(1

)

 

$

40,477

 

Corporate debt securities

 

 

18,634

 

 

 

4

 

 

 

(1

)

 

 

18,637

 

U.S. government agency securities and treasuries

 

 

8,822

 

 

 

1

 

 

 

—

 

 

 

8,823

 

Total

 

$

67,923

 

 

$

16

 

 

$

(2

)

 

$

67,937