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

The following tables summarize the Company’s investments accounted for as available-for-sale securities (in thousands, except years):

 

 

 

December 31, 2021

 

 

 

Maturity

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Estimated

 

 

 

(in years)

 

cost

 

 

losses

 

 

gains

 

 

fair value

 

US treasury securities

 

1 or less

 

$

18,116

 

 

$

(19

)

 

$

 

 

 

18,097

 

Corporate debt securities

 

1 or less

 

 

2,824

 

 

 

(2

)

 

 

 

 

 

2,822

 

Commercial paper

 

1 or less

 

 

31,566

 

 

 

 

 

 

 

 

 

31,566

 

Supranational debt securities

 

1 or less

 

 

1,503

 

 

 

 

 

 

 

 

 

1,503

 

US treasury securities

 

1-2

 

 

44,911

 

 

 

(141

)

 

 

 

 

 

44,770

 

Total

 

 

 

$

98,920

 

 

$

(162

)

 

$

 

 

$

98,758

 

 

 

 

 

December 31, 2020

 

 

 

Maturity

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Estimated

 

 

 

(in years)

 

cost

 

 

losses

 

 

gains

 

 

fair value

 

US treasury securities

 

1 or less

 

$

38,489

 

 

$

 

 

$

3

 

 

$

38,492

 

Corporate debt securities

 

1 or less

 

 

3,794

 

 

 

(1

)

 

 

 

 

 

3,793

 

Commercial paper

 

1 or less

 

 

11,040

 

 

 

 

 

 

 

 

 

11,040

 

Total

 

 

 

$

53,323

 

 

$

(1

)

 

$

3

 

 

$

53,325