CASH, CASH EQUIVALENTS AND INVESTMENTS (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Apr. 30, 2023	Jan. 31, 2023
Cash and Cash Equivalents
Accrued dividends	$ 0.5	$ 0.3
Held-to-maturity Securities
Cash and Cash Equivalents
Maturity period	1 year	1 year
Weighted average annual interest rates of CDs (as a percent)	5.20%	2.50%
Accrued interest	$ 0.7	$ 1.8