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Cash, Cash Equivalents, and Investments - Carrying Value of Investments (Details) - USD ($) $ in Thousands | Apr. 30, 2026 | Jan. 31, 2026
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 235,331 | $ 232,115
Unrealized Gain (Loss), Net | (254) | 321
Estimated Fair Value | 235,077 | 232,436
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 61,467 | 60,357
Unrealized Gain (Loss), Net | (27) | 72
Estimated Fair Value | 61,440 | 60,429
Commercial paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 5,183 | 2,218
Unrealized Gain (Loss), Net | (1) | 0
Estimated Fair Value | 5,182 | 2,218
Corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 141,775 | 143,257
Unrealized Gain (Loss), Net | (209) | 233
Estimated Fair Value | 141,566 | 143,490
U.S. Government agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 26,906 | 26,283
Unrealized Gain (Loss), Net | (17) | 16
Estimated Fair Value | $ 26,889 | $ 26,299

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- Definition Amount, before tax, of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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