Fair Value of Financial Instruments - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($)	May 01, 2021	Oct. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Equity securities in a public company	$ 562,719	$ 358,960
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Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Equity securities in a public company	$ 562,719	$ 358,960