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INCOME TAXES - Net Operating Loss Carryback (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 30, 2021 | Apr. 30, 2020 | Jan. 31, 2021 | Jan. 31, 2020
Operating Loss Carryforwards [Line Items] |  |  |  |
Federal corporate income tax rate (as percent) | 21.00% | 21.00% | 21.00% |
Increase in loss carryback period for certain losses | 5 years |  |  |
Domestic net operating loss carryback |  |  | $ 39,500 |
Deferred tax asset |  |  |  | $ 8,300
Amount of rate difference tax benefit |  | $ 4,175 |  |
Other current assets |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |
Income tax receivable | $ 12,700 |  |  |

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