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

Private Equity Offering - Additional Information (Detail)

v2.4.0.8
Private Equity Offering - Additional Information (Detail) (USD $)
 6 Months Ended 12 Months Ended 0 Months Ended 3 Months Ended 6 Months Ended
Nov. 30, 2013
May 31, 2013
May 31, 2010
Oct. 23, 2013
Private Equity Offering
Nov. 30, 2013
Private Equity Offering
Nov. 30, 2013
Private Equity Offering
Equity and Equity Units Offering Disclosure [Line Items]            
Units authorized to be sold at private equity offering       11,153,850    
Price per unit       $ 1.30    
Proceeds from units sold at private equity offering       $ 14,500,000   $ 14,500,000
Number of shares issued       2 20,989,494 2
Warrant to purchase common share       1 1 1
Exercisable warrants, exercise price 0.75     0.75 0.75 0.75
Convertible note, conversion amount $ 2,350,000 $ 567,000 $ 146,456   $ 857,000  
Convertible note, shares of common stock issued         1,318,206  
Number of common stock warrants issued         11,153,850 11,153,850