INCOME TAXES - Income Tax Expense Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
INCOME TAXES
Federal corporate income tax rate (as percent)	21.00%	21.00%
U.S. statutory federal income tax expense	$ 6,255	$ 2,376
State income taxes, net of federal tax effect	1,138	418
Unrecognized tax loss benefit		794
Executive compensation limitation	349	155
Stock-based compensation windfall	(478)	(349)
Other permanent differences and adjustments, net	(28)	37
Income tax expense	$ 7,236	$ 3,431