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Short-Term Investments (Tables)
 3 Months Ended
Mar. 31, 2024
Short-Term Investments [Abstract]  
Summary of Short-Term Investments

The following is a summary of our short-term investments (in thousands):

 

 

 

March 31, 2024

 

 

 

 

 

 

Gross

 

 

Gross

 

 

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Estimated

 

 

 

Cost

 

 

Gains

 

 

Losses

 

 

Fair Value

 

U.S. Treasury bills and government agency obligations

 

$

40,533

 

 

$

—

 

 

$

(6

)

 

$

40,527

 

U.S. corporate debt securities

 

 

6,298

 

 

 

—

 

 

 

(1

)

 

 

6,297

 

Foreign corporate debt securities

 

 

4,249

 

 

 

1

 

 

 

—

 

 

 

4,250

 

U.S. commercial paper

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Foreign commercial paper

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Total

 

$

51,080

 

 

$

1

 

 

$

(7

)

 

$

51,074

 

 

 

 

December 31, 2023

 

 

 

 

 

 

Gross

 

 

Gross

 

 

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Estimated

 

 

 

Cost

 

 

Gains

 

 

Losses

 

 

Fair Value

 

U.S. Treasury bills and government agency obligations

 

$

31,625

 

 

$

11

 

 

$

—

 

 

$

31,636

 

U.S. corporate debt securities

 

 

11,652

 

 

 

1

 

 

 

—

 

 

 

11,653

 

Foreign corporate debt securities

 

 

5,459

 

 

 

1

 

 

 

—

 

 

 

5,460

 

U.S. commercial paper

 

 

1,991

 

 

 

—

 

 

 

(1

)

 

 

1,990

 

Foreign commercial paper

 

 

993

 

 

 

—

 

 

 

—

 

 

 

993

 

Total

 

$

51,720

 

 

$

13

 

 

$

(1

)

 

$

51,732