March 31, 2023

Amortized
Cost

Unrealized
Gains

Unrealized
Losses

Estimated
Fair Value

Short-term

U.S. treasury securities

$

124,250

$

—

$

(519

)

$

123,731

U.S. agency bonds

5,000

—

(24

)

4,976

Certificates of deposit

1,960

—

(28

)

1,932

Short-term investments

$

131,210

$

—

$

(571

)

$

130,639

Long-term

U.S. treasury securities

$

19,237

$

72

$

—

$

19,309

Long-term investments

$

19,237

$

72

$

—

$

19,309

December 31, 2022

Short-term

U.S. treasury securities

$

135,878

$

—

$

(1,094

)

$

134,784

U.S. agency bonds

2,500

—

(11

)

2,489

Certificates of deposit

2,191

—

(32

)

2,159

Short-term investments

$

140,569

$

—

$

(1,137

)

$

139,432

Long-term

U.S. treasury securities

$

19,360

$

—

$

(126

)

$

19,234

U.S. agency bonds

2,500

—

(24

)

2,476

Certificates of deposit

245

—

(4

)

241

Long-term investments

$

22,105

$

—

$

(154

)

$

21,951