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

Summary of Significant Accounting Policies - Offering Costs - Additional Information (Detail)

v3.3.1.900
Summary of Significant Accounting Policies - Offering Costs - Additional Information (Detail) - USD ($)
Nov. 30, 2015
May. 31, 2015
May. 31, 2014
Summary Of Significant Accounting Policies [Line Items]      
Deferred offering costs   $ 0 $ 68,292
Debt and Equity Securities      
Summary Of Significant Accounting Policies [Line Items]      
Deferred offering costs     $ 2,084,000
Equity Securities      
Summary Of Significant Accounting Policies [Line Items]      
Deferred offering costs $ 1,400,000