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

Summary of Significant Accounting Policies - Preferred Stock - Additional Information (Detail)

v3.3.1.900
Summary of Significant Accounting Policies - Preferred Stock - Additional Information (Detail) - shares
Nov. 30, 2015
May. 31, 2015
May. 31, 2014
Series B Convertible Preferred Stock      
Summary Of Significant Accounting Policies [Line Items]      
Preferred Stock Shares authorized to be issued 400,000 400,000 400,000
Preferred Stock Shares outstanding 95,100 95,100 95,100
Maximum      
Summary Of Significant Accounting Policies [Line Items]      
Preferred Stock Shares authorized to be issued 5,000,000 5,000,000