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Fair Value Measurements - Unrealized Gain (Loss) on Investments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2025 | Jan. 31, 2024 | Jan. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Impairments | $ (11,578) | $ (3,101) | $ (38,036)
Upward adjustments | 0 | 0 | 4,125
Net unrealized gains (losses) on marketable equity securities | (2,428) | 15,197 | (12,524)
Net unrealized gains (losses) on strategic investments in equity securities | (14,006) | 12,096 | (46,435)
Net realized gains (losses) on strategic investments in equity securities | (17,414) | 34,713 | 0
Total—included in other income (expense), net | $ (31,420) | 46,809 | $ (46,435)
Samooha, Inc. |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Equity interest in acquiree, remeasurement gain |  | $ 34,000 |

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- Definition Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479536/321-10-50-4 + Details
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