Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Nov. 30, 2018
Nov. 30, 2017
Nov. 30, 2016
Income Tax [Line Items]      
Valuation allowance, changes in amount   $ (73,000) $ (329,000)
Effective income tax rate reconciliation at federal statutory income tax rate   34.00% 34.00%
Income tax expense   $ 3,000,000  
Minimum percentage probability of realized tax benefit on settlement   50.00%  
Uncertain tax provisions   $ 0 $ 0
Material provisions for interest or penalties related to uncertain tax positions   $ 0 $ 0
Scenario, Forecast [Member]      
Income Tax [Line Items]      
Effective income tax rate reconciliation at federal statutory income tax rate 21.00%