INCOME TAXES - Net Operating Loss Carryback (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Apr. 30, 2020	Oct. 31, 2020	Jan. 31, 2020
Operating Loss Carryforwards [Line Items]
Increase in loss carryback period for certain losses		5 years
Domestic net operating loss carryback			$ 39,500
Deferred tax asset operating loss carryforward			$ 8,300
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	21.00%
Amount of rate difference tax benefit	$ 4,400	$ 4,390
Other current assets
Operating Loss Carryforwards [Line Items]
Income tax receivable		$ 12,700