INCOME TAXES - Income Tax Expense Reconciliation (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
INCOME TAXES
Federal corporate income tax rate (as percent)			21.00%	21.00%
Computed expected income tax expense			$ 6,711,000	$ 7,135,000
Unrecognized tax loss benefit			3,255,000
State income taxes, net of federal tax effect			2,023,000	486,000
Foreign tax rate differential			(1,699,000)	(194,000)
Excess executive compensation			672,000	757,000
Meals and entertainment expense			385,000	48,000
Research and development credits adjustment				6,181,000
Other permanent differences and adjustments, net			269,000	97,000
Income tax expense	$ 6,129,000	$ 2,551,000	11,616,000	14,510,000
Foreign income tax expense			$ 3,000,000.0	$ 0