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INCOME TAXES - Income Tax Expense Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023
INCOME TAXES
Federal corporate income tax rate (as percent)	21.00%	21.00%	21.00%
Computed expected income tax expense	$ 23,353	$ 10,276	$ 9,660
State income taxes, net of federal tax effect	4,284	1,688	860
Unrecognized tax loss benefit	1,120	3,858
Executive compensation limitation	1,450	1,040	1,397
Adjustment to valuation for foreign NOLs	1,404	2,083	(2,574)
Meals and entertainment expense	860	626	83
Foreign tax rate differential	(793)	(2,294)	(441)
Net benefit related to Solar Tax Credit investments	(1,763)	(646)
Stock-based compensation windfall	(3,070)
Research and development tax credits adjustment			6,181
Recognition of research and development tax credit benefits			(3,430)
Other permanent differences and adjustments, net	(1,100)	(56)	(440)
Income tax expense	$ 25,745	$ 16,575	$ 11,296

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