Gross Unrealized

Losses

Amortized

Less than

Greater than

Estimated

September 30, 2023

Cost

Gains

One Year

One Year

Fair Value

Short-term investments:

Available-for-sale securities:

U.S. government and agency debt securities

$

137,689

$

7

$

(19

)

$

(985

)

$

136,692

Corporate debt securities

94,150

12

(32

)

(1,068

)

93,062

Non-U.S. government debt securities

11,784

—

—

(99

)

11,685

 Total short-term investments

243,623

19

(51

)

(2,152

)

241,439

Long-term investments:

Available-for-sale securities:

U.S. government and agency debt securities

67,979

—

(159

)

(738

)

67,082

Corporate debt securities

38,179

—

(44

)

(606

)

37,529

106,158

—

(203

)

(1,344

)

104,611

Held-to-maturity securities:

Certificates of deposit

1,820

—

—

—

1,820

Total long-term investments

107,978

—

(203

)

(1,344

)

106,431

Total investments

$

351,601

$

19

$

(254

)

$

(3,496

)

$

347,870

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