Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

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Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Jan. 31, 2018
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2017
Income Tax Disclosure [Abstract]        
Valuation allowance, changes in amount   $ 12,000 $ 711,000  
Effective income tax rate reconciliation at federal statutory income tax rate 21.00% 21.00% 22.10% 34.00%
Income tax expense       $ 3,100,000
Minimum percentage probability of realized tax benefit on settlement   50.00% 50.00%  
Uncertain tax provisions   $ 0 $ 0  
Material provisions for interest or penalties related to uncertain tax positions   0 0  
US income taxes paid   $ 2,801,000 $ 2,204,000