XML 32 R22.htm IDEA: XBRL DOCUMENT v3.23.3
Marketable Securities (Tables)
 9 Months Ended
Oct. 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 October 31, 2023, January 31, 2023 and October 31, 2022 were as follows:

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gains

 

 

(Losses)

 

 

Value

 

As of October 31, 2023

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

102,766

 

 

$

—

 

 

$

(1,336

)

 

$

101,430

 

Federal government agencies

 

 

66,216

 

 

 

—

 

 

 

(233

)

 

 

65,983

 

Municipal and pre-refunded municipal bonds

 

 

48,115

 

 

 

—

 

 

 

(727

)

 

 

47,388

 

Commercial paper

 

 

20,976

 

 

 

—

 

 

 

—

 

 

 

20,976

 

US Treasury securities

 

 

13,157

 

 

 

—

 

 

 

(7

)

 

 

13,150

 

Certificates of deposit

 

 

249

 

 

 

—

 

 

 

—

 

 

 

249

 

 

 

251,479

 

 

 

—

 

 

 

(2,303

)

 

 

249,176

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

53,555

 

 

 

4

 

 

 

(1,155

)

 

 

52,404

 

Federal government agencies

 

 

49,203

 

 

 

—

 

 

 

(388

)

 

 

48,815

 

Municipal and pre-refunded municipal bonds

 

 

10,224

 

 

 

3

 

 

 

(136

)

 

 

10,091

 

US Treasury securities

 

 

7,398

 

 

 

1

 

 

 

(71

)

 

 

7,328

 

Mutual funds, held in rabbi trust

 

 

13,252

 

 

 

147

 

 

 

(348

)

 

 

13,051

 

Certificates of deposit

 

 

1,250

 

 

 

—

 

 

 

—

 

 

 

1,250

 

 

 

134,882

 

 

 

155

 

 

 

(2,098

)

 

 

132,939

 

 

$

386,361

 

 

$

155

 

 

$

(4,401

)

 

$

382,115

 

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 October 31, 2022

 

 

 

 

 

 

 

 

 

 

 

 

Short-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

$

85,788

 

 

$

—

 

 

$

(1,626

)

 

$

84,162

 

Municipal and pre-refunded municipal bonds

 

 

58,417

 

 

 

—

 

 

 

(910

)

 

 

57,507

 

US Treasury securities

 

 

4,750

 

 

 

—

 

 

 

(55

)

 

 

4,695

 

 

 

148,955

 

 

 

—

 

 

 

(2,591

)

 

 

146,364

 

Long-term Investments:

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds

 

 

61,707

 

 

 

—

 

 

 

(4,472

)

 

 

57,235

 

Municipal and pre-refunded municipal bonds

 

 

28,803

 

 

 

—

 

 

 

(1,801

)

 

 

27,002

 

Mutual funds, held in rabbi trust

 

 

12,546

 

 

 

—

 

 

 

(1,786

)

 

 

10,760

 

Certificates of deposit

 

 

249

 

 

 

—

 

 

 

—

 

 

 

249

 

 

 

103,305

 

 

 

—

 

 

 

(8,059

)

 

 

95,246

 

 

$

252,260

 

 

$

—

 

 

$

(10,650

)

 

$

241,610