INCOME TAXES - Income Tax Expense Reconciliation (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022
INCOME TAXES
Federal corporate income tax rate (as percent)			21.00%	21.00%
Computed expected income tax expense			$ 4,276,000	$ 4,970,000
State income taxes, net of federal tax effect			455,000	349,000
Unrecognized tax loss benefit			529,000
GILTI			505,000	225,000
Excess executive compensation			400,000	445,000
Foreign tax rate differential			(643,000)	(120,000)
Tax credits			(453,000)	(124,000)
Research and development credits adjustment				6,181,000
Other permanent differences and adjustments, net			418,000	33,000
Income tax expense	$ 4,592,000	$ 9,686,000	5,487,000	11,959,000
Foreign income tax expense			$ 1,500,000	$ 0