Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.10.0.1
Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Jan. 31, 2018
Nov. 30, 2018
Nov. 30, 2017
Nov. 30, 2016
Income Tax Disclosure [Abstract]        
Valuation allowance, changes in amount   $ (711,000) $ (73,000)  
Effective income tax rate reconciliation at federal statutory income tax rate 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 $ 0
Material provisions for interest or penalties related to uncertain tax positions   $ 0 $ 0 $ 0