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CASH, CASH EQUIVALENTS AND INVESTMENTS - Investments (Details) - USD ($) $ in Thousands | Apr. 30, 2024 | Jan. 31, 2024
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CASH, CASH EQUIVALENTS AND INVESTMENTS |  |
Short-term investments | $ 84,029 | $ 109,489
Available-for-sale securities | 124,589 | 105,884
Total investments | $ 208,618 | $ 215,373

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