Annual report pursuant to Section 13 and 15(d)

Description of Business and Summary of Significant Accounting Policies - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail)

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Description of Business and Summary of Significant Accounting Policies - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
Nov. 30, 2017
Nov. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total $ 439,322 $ 624,223
Fair Value, Measurements, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities 96,600 304,142
Available-for-sale securities 342,722 320,081
Total 439,322 624,223
Level 1 [Member] | Fair Value, Measurements, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Trading securities 96,600 304,142
Available-for-sale securities 342,722 320,081
Total $ 439,322 $ 624,223