Quarterly report pursuant to Section 13 or 15(d)

Convertible Instruments - Additional Information (Detail)

v2.4.0.8
Convertible Instruments - Additional Information (Detail) (USD $)
 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
May 31, 2014
Aug. 31, 2014
Investor
Aug. 31, 2014
Minimum
Aug. 31, 2014
Minimum
Investor
Aug. 31, 2014
Maximum
Aug. 31, 2014
Maximum
Investor
May 31, 2010
Series B Convertible Preferred Stock
Aug. 31, 2014
Series B Convertible Preferred Stock
May 31, 2014
Series B Convertible Preferred Stock
May 31, 2010
Common Stock
Apr. 30, 2010
Common Stock
Class of Stock [Line Items]                          
Preferred Stock, Shares issued                 400,000 95,100 95,100    
Preferred Stock, Share issuance price                 $ 5.00        
Cash proceeds                 $ 2,009,000        
Preferred stock shares outstanding                   95,100 95,100    
Number of common shares issued upon conversion of preferred stock                       10  
Convertible note conversion price per share $ 0.75                     $ 0.50  
Common stock shares authorized for issuance 100,000,000   100,000,000                   100,000,000
Constructive dividend to Preferred stock holders 6,000,000                        
Liquidation preference on common shares $ 5.00                        
Dividends are payable to preferred stock holders $ 0.25                        
Face amount of notes 0   1,200,000                    
Convertible note, face amount 4,271,250   7,221,250                    
Convertible note maturity start date Oct. 01, 2015                        
Convertible note maturity end date Mar. 06, 2016                        
Interest rate on convertible notes         5.00%   10.00%            
Interest on convertible notes payment start date       Apr. 01, 2013                  
Common stock warrant term           2 years   3 years          
Warrants to purchase common shares, shares       9,451,056                  
Warrants exercise price per share           $ 0.50   $ 2.00          
Amortization expense $ 356,000 $ 1,452,000