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CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jan. 31, 2022
Schedule of Available-for-sale Securities
Cash and cash equivalents, cost basis	$ 256,502	$ 320,439	$ 358,805
Cash and cash equivalents, fair value	256,502		358,805
Maturities and sales of investments	300	$ 45,600
Bank time deposits
Schedule of Available-for-sale Securities
Cost Basis	718		765
Gross Unrealized Gains	0		0
Gross Unrealized Losses	0		0
Estimated Fair Value	718		765
Total short-term investments
Schedule of Available-for-sale Securities
Cost Basis	718		765
Gross Unrealized Gains	0		0
Gross Unrealized Losses	0		0
Estimated Fair Value	718		765
Cash and bank time deposits
Schedule of Available-for-sale Securities
Cash and cash equivalents, cost basis	143,442		201,769
Cash and cash equivalents, fair value	143,442		201,769
Money market funds
Schedule of Available-for-sale Securities
Cash and cash equivalents, cost basis	43,369		127,041
Cash and cash equivalents, fair value	43,369		127,041
Commercial paper
Schedule of Available-for-sale Securities
Cash and cash equivalents, cost basis	69,691		29,995
Cash and cash equivalents, fair value	$ 69,691		$ 29,995

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- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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