Fair Values of Financial Investments - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($)	Nov. 06, 2021	Oct. 31, 2020
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Equity securities in a public company	$ 621,928	$ 358,960
Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Equity securities in a public company	621,928	358,960
Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Equity securities in a public company
Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Equity securities in a public company