INCOME TAXES - Income Tax Expense Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
INCOME TAXES
Federal corporate income tax rate (as percent)			21.00%	21.00%
Computed expected income tax expense			$ (6,635)	$ (367)
State income taxes, net of federal tax effect			(719)	(44)
Deferred tax asset adjustments			283
Net operating loss carryback benefit				4,286
Realizable (unrealizable) NOL benefit (UK)			18	(582)
Adjustments and other differences			(340)	(236)
Income tax (expense) benefit	$ (4,191)	$ (1,397)	(7,959)	$ 3,057
Foreign income tax expense			$ 400

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Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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