XML 32 R22.htm IDEA: XBRL DOCUMENT v3.23.2
Marketable Securities (Tables)
 6 Months Ended
Jul. 31, 2023
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 July 31, 2023, January 31, 2023 and July 31, 2022 were as follows:

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of July 31, 2023

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

96,902

 

 

$

1

 

 

$

(1,239

)

 

$

95,664

 

Federal government agencies

 

 

47,287

 

 

 

—

 

 

 

(163

)

 

 

47,124

 

Municipal and pre-refunded municipal bonds

 

 

48,350

 

 

 

—

 

 

 

(670

)

 

 

47,680

 

Commercial paper

 

 

41,719

 

 

 

—

 

 

 

—

 

 

 

41,719

 

US Treasury securities

 

 

18,661

 

 

 

—

 

 

 

(16

)

 

 

18,645

 

 

 

252,919

 

 

 

1

 

 

 

(2,088

)

 

 

250,832

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

47,835

 

 

 

—

 

 

 

(1,745

)

 

 

46,090

 

Federal government agencies

 

 

44,914

 

 

 

—

 

 

 

(464

)

 

 

44,450

 

Municipal and pre-refunded municipal bonds

 

 

13,980

 

 

 

—

 

 

 

(469

)

 

 

13,511

 

US Treasury securities

 

 

2,969

 

 

 

—

 

 

 

(61

)

 

 

2,908

 

Mutual funds, held in rabbi trust

 

 

12,941

 

 

 

1,027

 

 

 

(70

)

 

 

13,898

 

Certificates of deposit

 

 

1,499

 

 

 

—

 

 

 

—

 

 

 

1,499

 

 

 

124,138

 

 

 

1,027

 

 

 

(2,809

)

 

 

122,356

 

 

$

377,057

 

 

$

1,028

 

 

$

(4,897

)

 

$

373,188

 

As of January 31, 2023

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

83,184

 

 

$

—

 

 

$

(947

)

 

$

82,237

 

Federal government agencies

 

 

6,501

 

 

 

—

 

 

 

(1

)

 

 

6,500

 

Municipal and pre-refunded municipal bonds

 

 

48,141

 

 

 

—

 

 

 

(688

)

 

 

47,453

 

Commercial paper

 

 

21,636

 

 

 

—

 

 

 

—

 

 

 

21,636

 

US Treasury securities

 

 

23,561

 

 

 

1

 

 

 

(10

)

 

 

23,552

 

 

 

183,023

 

 

 

1

 

 

 

(1,646

)

 

 

181,378

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

62,594

 

 

 

22

 

 

 

(3,319

)

 

 

59,297

 

Federal government agencies

 

 

9,021

 

 

 

13

 

 

 

(2

)

 

 

9,032

 

Municipal and pre-refunded municipal bonds

 

 

23,437

 

 

 

5

 

 

 

(1,154

)

 

 

22,288

 

Mutual funds, held in rabbi trust

 

 

13,402

 

 

 

—

 

 

 

(1,424

)

 

 

11,978

 

Certificates of deposit

 

 

249

 

 

 

—

 

 

 

—

 

 

 

249

 

 

 

108,703

 

 

 

40

 

 

 

(5,899

)

 

 

102,844

 

 

$

291,726

 

 

$

41

 

 

$

(7,545

)

 

$

284,222

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of July 31, 2022

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

76,652

 

 

$

—

 

 

$

(1,211

)

 

$

75,441

 

Municipal and pre-refunded municipal bonds

 

 

75,518

 

 

 

—

 

 

 

(595

)

 

 

74,923

 

US Treasury securities

 

 

9,749

 

 

 

—

 

 

 

(93

)

 

 

9,656

 

 

 

161,919

 

 

 

—

 

 

 

(1,899

)

 

 

160,020

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

96,086

 

 

 

—

 

 

 

(4,160

)

 

 

91,926

 

Federal government agencies

 

 

350

 

 

 

—

 

 

 

(12

)

 

 

338

 

Municipal and pre-refunded municipal bonds

 

 

47,437

 

 

 

—

 

 

 

(1,858

)

 

 

45,579

 

US Treasury securities

 

 

3,229

 

 

 

—

 

 

 

(129

)

 

 

3,100

 

Mutual funds, held in rabbi trust

 

 

12,361

 

 

 

—

 

 

 

(1,025

)

 

 

11,336

 

Certificates of deposit

 

 

249

 

 

 

—

 

 

 

—

 

 

 

249

 

 

 

159,712

 

 

 

—

 

 

 

(7,184

)

 

 

152,528

 

 

$

321,631

 

 

$

—

 

 

$

(9,083

)

 

$

312,548