Fair Values of Financial Investments - Summary of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) - USD ($)	Aug. 04, 2018	Nov. 04, 2017
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Equity securities in a public company	$ 557,448	$ 627,087
Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]
Equity securities in a public company	$ 557,448	$ 627,087

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

No definition available.

Name:	us-gaap_AvailableForSaleSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant