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Derivative financial instruments - Summary of Fair Values Of Net Investment Contracts (Details) | Jul. 31, 2023 USD ($)
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Prepaid expenses and other current assets |
Investments, All Other Investments [Abstract] |
Net investment contracts | $ 2,977,000
Derivative [Line Items] |
Net investment contracts | 2,977,000
Other assets |
Investments, All Other Investments [Abstract] |
Net investment contracts | 59,000
Derivative [Line Items] |
Net investment contracts | 59,000
Accrued liabilities |
Investments, All Other Investments [Abstract] |
Net investment contracts | 841,000
Derivative [Line Items] |
Net investment contracts | 841,000
Other long-term liabilities |
Investments, All Other Investments [Abstract] |
Net investment contracts | 3,760,000
Derivative [Line Items] |
Net investment contracts | $ 3,760,000

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