XML 29 R22.htm IDEA: XBRL DOCUMENT v3.24.1.1.u2
Marketable Securities (Tables)
 3 Months Ended
Apr. 30, 2024
Investments, Debt and Equity Securities [Abstract]  
Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Available-For-Sale Securities The amortized cost, gross unrealized gains (losses) and fair value of available-for-sale securities by major security type and class of security as of April 30, 2024, January 31, 2023 and April 30, 2023 were as follows:

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of April 30, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

145,891

 

 

$

3

 

 

$

(1,000

)

 

$

144,894

 

Federal government agencies

 

 

76,515

 

 

 

—

 

 

 

(204

)

 

 

76,311

 

Municipal and pre-refunded municipal bonds

 

 

49,515

 

 

 

4

 

 

 

(204

)

 

 

49,315

 

US Treasury securities

 

 

28,925

 

 

 

—

 

 

 

(127

)

 

 

28,798

 

Certificates of deposit

 

 

10,249

 

 

 

—

 

 

 

—

 

 

 

10,249

 

Commercial paper

 

 

2,991

 

 

 

—

 

 

 

—

 

 

 

2,991

 

 

 

314,086

 

 

 

7

 

 

 

(1,535

)

 

 

312,558

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

119,907

 

 

 

19

 

 

 

(1,116

)

 

 

118,810

 

Federal government agencies

 

 

53,486

 

 

 

—

 

 

 

(502

)

 

 

52,984

 

Municipal and pre-refunded municipal bonds

 

 

38,785

 

 

 

9

 

 

 

(286

)

 

 

38,508

 

US Treasury securities

 

 

49,943

 

 

 

—

 

 

 

(677

)

 

 

49,266

 

Certificates of deposit

 

 

11,250

 

 

 

—

 

 

 

—

 

 

 

11,250

 

Mutual funds, held in rabbi trust

 

 

15,950

 

 

 

443

 

 

 

(33

)

 

 

16,360

 

 

 

289,321

 

 

 

471

 

 

 

(2,614

)

 

 

287,178

 

 

$

603,407

 

 

$

478

 

 

$

(4,149

)

 

$

599,736

 

As of January 31, 2024

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

123,418

 

 

$

27

 

 

$

(883

)

 

$

122,562

 

Federal government agencies

 

 

68,730

 

 

 

35

 

 

 

(94

)

 

 

68,671

 

Municipal and pre-refunded municipal bonds

 

 

47,915

 

 

 

9

 

 

 

(414

)

 

 

47,510

 

US Treasury securities

 

 

27,231

 

 

 

—

 

 

 

(36

)

 

 

27,195

 

Certificates of deposit

 

 

10,249

 

 

 

—

 

 

 

—

 

 

 

10,249

 

Commercial paper

 

 

10,557

 

 

 

—

 

 

 

—

 

 

 

10,557

 

 

 

288,100

 

 

 

71

 

 

 

(1,427

)

 

 

286,744

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

147,924

 

 

 

441

 

 

 

(388

)

 

 

147,977

 

Federal government agencies

 

 

65,698

 

 

 

138

 

 

 

(94

)

 

 

65,742

 

Municipal and pre-refunded municipal bonds

 

 

39,243

 

 

 

160

 

 

 

(35

)

 

 

39,368

 

US Treasury securities

 

 

34,604

 

 

 

169

 

 

 

(26

)

 

 

34,747

 

Certificates of deposit

 

 

11,250

 

 

 

—

 

 

 

—

 

 

 

11,250

 

Mutual funds, held in rabbi trust

 

 

13,817

 

 

 

1,344

 

 

 

(93

)

 

 

15,068

 

 

 

312,536

 

 

 

2,252

 

 

 

(636

)

 

 

314,152

 

 

$

600,636

 

 

$

2,323

 

 

$

(2,063

)

 

$

600,896

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of April 30, 2023

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

86,052

 

 

$

1

 

 

$

(1,214

)

 

$

84,839

 

Federal government agencies

 

 

21,284

 

 

 

—

 

 

 

(28

)

 

 

21,256

 

Municipal and pre-refunded municipal bonds

 

 

45,467

 

 

 

—

 

 

 

(547

)

 

 

44,920

 

US Treasury securities

 

 

22,903

 

 

 

1

 

 

 

(16

)

 

 

22,888

 

Commercial paper

 

 

35,874

 

 

 

—

 

 

 

—

 

 

 

35,874

 

 

 

211,580

 

 

 

2

 

 

 

(1,805

)

 

 

209,777

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

42,823

 

 

 

17

 

 

 

(2,141

)

 

 

40,699

 

Federal government agencies

 

 

14,340

 

 

 

9

 

 

 

(37

)

 

 

14,312

 

Municipal and pre-refunded municipal bonds

 

 

19,071

 

 

 

5

 

 

 

(906

)

 

 

18,170

 

Certificates of deposit

 

 

249

 

 

 

—

 

 

 

—

 

 

 

249

 

Mutual funds, held in rabbi trust

 

 

12,656

 

 

 

132

 

 

 

(62

)

 

 

12,726

 

 

 

89,139

 

 

 

163

 

 

 

(3,146

)

 

 

86,156

 

 

$

300,719

 

 

$

165

 

 

$

(4,951

)

 

$

295,933