INCOME TAXES - Net Operating Loss Carryback (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
INCOME TAXES
Increase in loss carryback period for certain losses	5 years
Net operating loss carry forward	$ 6,300
Domestic net operating loss carryback	39,500
Deferred tax asset		$ 8,300
Income tax receivable	$ 12,700
Federal corporate income tax rate (as percent)	21.00%	21.00%	21.00%
Amount of rate difference tax benefit	$ 4,392