General form of registration statement for all companies including face-amount certificate companies

Summary of Significant Accounting Policies - Identified Intangible Assets - Additional Information (Detail)

v3.3.1.900
Summary of Significant Accounting Policies - Identified Intangible Assets - Additional Information (Detail) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Nov. 30, 2015
Nov. 30, 2014
Nov. 30, 2015
Nov. 30, 2014
May. 31, 2015
May. 31, 2014
Summary Of Significant Accounting Policies [Line Items]            
Impairment charges $ 0 $ 0 $ 0 $ 0 $ 0 $ 0