CASH, CASH EQUIVALENTS AND INVESTMENTS (Tables)

3 Months Ended

Apr. 30, 2026

CASH, CASH EQUIVALENTS AND INVESTMENTS

Summary of investments

	April 30,		January 31,
	2026		2026
Short-term investments	$	172,803	$	151,901
Available-for-sale securities		444,905		403,599
Total investments	$	617,708	$	555,500

Schedule of available-for-sale securities

	April 30, 2026
			Allowance for		Gross		Gross		Estimated
	Amortized		Credit		Unrealized		Unrealized		Fair
	Cost		Losses		Gains		Losses		Value
U.S. Treasury notes:
Due within one year	$	50,284	$	—	$	228	$	—	$	50,512
Due in one to three years		84,984		—		744		107		85,621
Due in three to five years		310,051		—		742		2,021		308,772
Totals	$	445,319	$	—	$	1,714	$	2,128	$	444,905

	January 31, 2026
			Allowance for		Gross		Gross		Estimated
	Amortized		Credit		Unrealized		Unrealized		Fair
	Cost		Losses		Gains		Losses		Value
U.S. Treasury notes:
Due within one year	$	45,446	$	—	$	127	$	8	$	45,565
Due in one to three years		77,931		—		1,182		13		79,100
Due in three to five years		277,196		—		2,192		454		278,934
Totals	$	400,573	$	—	$	3,501	$	475	$	403,599