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Fair Value of Financial Instruments (Details 1) - USD ($) $ in Thousands | Oct. 31, 2025 | Jul. 31, 2025
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | $ 1,264,637 | $ 1,326,839
Unrealized Gains | 1,698 | 676
Unrealized Losses | (108) | (264)
Estimated Fair Value | 1,266,227 | 1,327,251
Commercial paper |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 171,511 | 130,628
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 171,511 | 130,628
Corporate bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 507,420 | 424,791
Unrealized Gains | 1,336 | 545
Unrealized Losses | (62) | (138)
Estimated Fair Value | 508,694 | 425,198
Certificates of deposit |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 72,450 | 80,970
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 72,450 | 80,970
U.S. Government bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 56,135 | 64,187
Unrealized Gains | 148 | 36
Unrealized Losses | (2) | (39)
Estimated Fair Value | 56,281 | 64,184
Money market funds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 294,010 | 488,854
Unrealized Gains | 0 | 0
Unrealized Losses | 0 | 0
Estimated Fair Value | 294,010 | 488,854
U.S. Government agency securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 79,034 | 66,184
Unrealized Gains | 67 | 15
Unrealized Losses | (16) | (70)
Estimated Fair Value | 79,085 | 66,129
Asset-backed securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 82,257 | 69,405
Unrealized Gains | 136 | 69
Unrealized Losses | (28) | (17)
Estimated Fair Value | 82,365 | 69,457
Foreign government bonds |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Amortized Cost | 1,820 | 1,820
Unrealized Gains | 11 | 11
Unrealized Losses | 0 | 0
Estimated Fair Value | $ 1,831 | $ 1,831

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- Definition Amount, before tax, of unrealized gain 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/2003/role/disclosureRef -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 + Details
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