Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Federal Statutory Rate to Pretax Income (Detail)

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Income Taxes - Summary of Federal Statutory Rate to Pretax Income (Detail) - USD ($)
12 Months Ended
Jan. 31, 2018
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2017
Income Tax Disclosure [Abstract]        
Tax at Federal Statutory Rate, Amount   $ 733,198 $ 799,507  
State Income Tax Effect, Amount   220,527 216,608  
Tax Compensation Differences, Amount   26,330 260,845  
Permanent Disallowances, Amount   76,775 149,141  
Impact of Tax Reform, Amount     3,078,094  
Deferred Repricing, Amount   24,533 (28,337)  
Other, Amount   19,278 (3,354)  
Foreign tax credits, Amount   (108,150) (108,314)  
Foreign tax withholding, Amount   108,150 108,314  
Income Tax Expense   $ 1,100,641 $ 4,472,504  
Tax at Federal Statutory Rate 21.00% 21.00% 22.10% 34.00%
State Income Tax Effect, Rate   6.32% 5.99%  
Valuation Allowance Release, Rate   0.00% 0.00%  
Tax Compensation Differences, Rate   0.75% 7.21%  
Permanent Disallowances, Rate   2.20% 4.12%  
Impact of Tax Reform, Rate   0.00% 85.08%  
Deferred Repricing, Rate   (0.70%) 0.78%  
Other, Rate   (0.10%) (0.09%)  
Foreign tax credits, Rate   (3.10%) (2.99%)  
Foreign tax withholding, Rate   3.10% 2.99%  
Total income taxes, Rate   30.87% 123.63%