CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)

3 Months Ended

Apr. 30, 2025

CASH, CASH EQUIVALENTS AND INVESTMENTS

Summary of investments

	April 30,		January 31,
	2025		2025
Short-term investments	$	115,048	$	153,129
Available-for-sale securities		242,158		226,745
Total investments	$	357,206	$	379,874

Schedule of available-for-sale securities

	April 30, 2025
			Allowance for		Gross		Gross		Estimated
	Amortized		Credit		Unrealized		Unrealized		Fair
	Cost		Losses		Gains		Losses		Value
U.S. Treasury notes:
Due within one year	$	50,463	$	—	$	76	$	27	$	50,512
Due in one to three years		76,240		—		1,141		—		77,381
Due in three to five years		112,311		—		2,225		271		114,265
Totals	$	239,014	$	—	$	3,442	$	298	$	242,158

	January 31, 2025
			Allowance for		Gross		Gross		Estimated
	Amortized		Credit		Unrealized		Unrealized		Fair
	Cost		Losses		Gains		Losses		Value
U.S. Treasury notes:
Due within one year	$	50,676	$	—	$	126	$	7	$	50,795
Due in one to three years		84,881		—		381		105		85,157
Due in three to five years		91,599		—		124		930		90,793
Totals	$	227,156	$	—	$	631	$	1,042	$	226,745