CASH AND CASH EQUIVALENTS, INVESTMENTS, AND FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)	3 Months Ended	9 Months Ended
	Oct. 31, 2025	Oct. 31, 2025	Oct. 31, 2024	Jan. 31, 2025
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Investments, weighted average maturity		18 months
Investments, term		2 years
Debt and equity securities	$ 192,336,000	$ 192,336,000		$ 395,444,000
Asset impairment charges		2,205,000	$ 1,481,000
Strategic Investments
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Gain on investments	500,000	1,300,000	300,000
Asset impairment charges		0	$ 0
Level 3 | Strategic Investments
Fair Value Assets and Liabilities Measure On Recurring And Nonrecurring Basis [Line Items]
Debt and equity securities	$ 30,600,000	$ 30,600,000		$ 23,200,000