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INCOME TAXES - Research and Development Tax Credits (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jul. 31, 2022 | Jan. 31, 2019 | Jan. 31, 2022 | Jan. 31, 2020
Prior period for identify and quantify the amounts of research and development credits |  | 3 years |  |
Research and development tax credit benefit |  | $ 16.6 |  | $ 0.4
Unrecognized income tax benefits related to research and development credits |  |  | $ 5.0 |
Unfavorable adjustment | $ 6.2 |  |  |
Income tax refunds and prepaid income taxes | 14.9 |  | $ 29.5 |
Internal Revenue Service (IRS) |  |  |  |
Settlement offer from the IRS | $ 7.9 |  |  |

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