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INCOME TAXES - Research and Development Tax Credits and Income Tax Refunds (Details) - USD ($) $ in Thousands | 9 Months Ended |
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Oct. 31, 2024 | Jan. 31, 2024
INCOME TAXES |  |
Federal research and development tax credits | $ 5,800 |
Unrecognized income tax benefits related to research and development credits | 2,400 |
Income tax refunds and prepaid income taxes | $ 18,926 | $ 18,267

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