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Short-term Investments (Tables)
 6 Months Ended
May 01, 2021
Investments, Debt and Equity Securities [Abstract]  
Summary of Short-term Investments
The following is a summary of short-term investments (available for sale):
 
   May 1, 2021 
   Cost   Gross
Unrealized
Gains		   Gross
Unrealized
Losses		   Estimated
Fair Value		 
Equity securities in a public company
  $167,930   $394,789   $—      $562,719 
   
 
 
   
 
 
   
 
 
   
 
 
 
 
   October 31, 2020 
   Cost   Gross
Unrealized
Gains		   Gross
Unrealized
Losses		   Estimated
Fair Value		 
Equity securities in a public company
  $167,930   $191,030   $—     $358,960