Gross Unrealized

Losses

Amortized

Less than

Greater than

Estimated

December 31, 2023

Cost

Gains

One Year

Fair Value

Short-term investments:

Available-for-sale securities:

U.S. government and agency debt securities

$

199,708

$

758

$

(36

)

$

(611

)

$

199,819

Corporate debt securities

112,055

703

(15

)

(536

)

112,207

Non-U.S. government debt securities

4,004

—

—

(8

)

3,996

 Total short-term investments

315,767

1,461

(51

)

(1,155

)

316,022

Long-term investments:

Available-for-sale securities:

U.S. government and agency debt securities

19,392

—

(27

)

(315

)

19,050

Corporate debt securities

19,306

—

—

(289

)

19,017

38,698

—

(27

)

(604

)

38,067

Held-to-maturity securities:

Certificates of deposit

1,820

—

—

—

1,820

Total long-term investments

40,518

—

(27

)

(604

)

39,887

Total investments

$

356,285

$

1,461

$

(78

)

$

(1,759

)

$

355,909

December 31, 2022

Short-term investments:

Available-for-sale securities:

Corporate debt securities

$

141,418

$

—

$

(424

)

$

(2,054

)

$

138,940

U.S. government and agency debt securities

143,710

16

(266

)

(1,289

)

142,171

Non-U.S. government debt securities

35,455

—

(28

)

(546

)

34,881

 Total short-term investments

320,583

16

(718

)

(3,889

)

315,992

Long-term investments:

Available-for-sale securities:

Corporate debt securities

68,229

—

(1,550

)

(676

)

66,003

U.S. government and agency debt securities

62,220

—

(917

)

(1,424

)

59,879

Non-U.S. government debt securities

4,099

—

—

(191

)

3,908

134,548

—

(2,467

)

(2,291

)

129,790

Held-to-maturity securities:

Certificates of deposit

1,820

—

—

—

1,820

Total long-term investments

136,368

—

(2,467

)

(2,291

)

131,610

Total investments

$

456,951

$

16

$

(3,185

)

$

(6,180

)

$

447,602