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

Convertible Instruments - Additional Information (Detail)

v3.2.0.727
Convertible Instruments - Additional Information (Detail) - Entity [Domain] - USD ($)
2 Months Ended 3 Months Ended 12 Months Ended
May. 31, 2013
May. 31, 2015
May. 31, 2015
Mar. 31, 2015
May. 31, 2014
May. 31, 2013
May. 31, 2010
Feb. 06, 2015
Sep. 26, 2014
Apr. 30, 2010
Class of Stock [Line Items]                    
Conversion price $ 0.75       $ 0.65 $ 0.75        
Common stock, shares authorized   200,000,000 200,000,000   100,000,000         100,000,000
Constructive dividend to Preferred stock holders     $ 6,000,000              
Liquidation preference on common shares   $ 5.00 $ 5.00              
Dividends are payable to preferred stock holders     $ 0.25              
Face amount of notes $ 6,588,250       $ 1,200,000 $ 6,588,250        
Convertible note, principal amount   $ 50,000 $ 50,000   $ 1,500,000          
Convertible note maturity start date           Nov. 30, 2013        
Convertible note maturity end date           Mar. 06, 2016        
Convertible notes, interest rate 7.00%       5.00% 7.00%        
Exercise price of warrants, per share $ 0.75 $ 0.50 $ 0.50     $ 0.75        
Accrued but unpaid interest         $ 6,351          
Principal amount of notes converted     $ 4,221,250   $ 2,450,000          
Common stock issued upon conversion of notes         2,087,717          
Payments on convertible notes payable         $ 500,000          
Convertible notes term 6 months       6 months          
Warrants issued to investors     285,118              
Amortization expense     $ 2,145,000   $ 3,807,000          
Convertible note maturity date         Oct. 01, 2013          
Conversion Instruments Exercised         $ 250,000          
Sale of convertible notes   $ 4,000,000 $ 7,481,050   $ 1,200,000          
Decrease in conversion price of common stock   $ 0.675 $ 0.675              
Percentage of weighted average price per share   90.00%                
Weighted average price per share   $ 0.75 $ 0.75              
Term of warrants 5 years   5 years              
Amortization of the debt discount   $ 219,000 $ 219,000              
Minimum                    
Class of Stock [Line Items]                    
Preferred Stock, Share issuance price   $ 0.33 $ 0.33   $ 0.40          
Convertible notes, interest rate 5.00%         5.00%        
Exercise price of warrants, per share   0.75 0.75              
Maximum                    
Class of Stock [Line Items]                    
Preferred Stock, Share issuance price   0.60 0.60   0.67          
Convertible notes, interest rate 10.00%         10.00%        
Exercise price of warrants, per share   2.00 2.00              
Alpha Venture Capital Partners, L.P.                    
Class of Stock [Line Items]                    
Preferred Stock, Share issuance price   0.9444 0.9444              
Conversion price   $ 1.00 $ 1.00              
Face amount of notes   $ 1,500,000 $ 1,500,000         $ 1,500,000 $ 2,000,000  
Convertible notes, interest rate   1.20% 1.20%              
Exercise price of warrants, per share   $ 0.50 $ 0.50         $ 0.50 $ 0.50  
Convertible note maturity date     May 05, 2015              
Additional convertible promissory notes that may be issued   $ 6,000,000 $ 6,000,000              
Percentage reduction to conversion price     10.00%              
Convertible note, conversion price description     The embedded derivative features consist of the conversion price being subject to (i) adjustment for stock splits and similar corporate events and (ii) reduction to a conversion price per share that is 10% below the lowest sale price that is below $.9444 per share for common stock sold or deemed sold in future securities offerings, subject to certain exempt transactions.              
Term of warrants     5 years              
Investor                    
Class of Stock [Line Items]                    
Interest on convertible notes payment start date           Apr. 01, 2013        
Common stock warrant term           2 years        
Number of shares purchased 8,527,984 9,451,056 9,451,056     8,527,984        
Exercise price of warrants, per share         $ 0.50          
Warrants issued to investors         923,072          
Investor | Minimum                    
Class of Stock [Line Items]                    
Common stock warrant term     2 years              
Exercise price of warrants, per share $ 0.75 $ 0.50 $ 0.50     $ 0.75        
Investor | Maximum                    
Class of Stock [Line Items]                    
Common stock warrant term     3 years              
Exercise price of warrants, per share 2.00 $ 2.00 $ 2.00     2.00        
Detachable common stock warrants with a two-year term | Alpha Venture Capital Partners, L.P.                    
Class of Stock [Line Items]                    
Number of shares purchased   250,000 250,000           250,000  
Warrants, expiration date     Dec. 31, 2019              
Detachable common stock warrants, with terms of two or three years | Alpha Venture Capital Partners, L.P.                    
Class of Stock [Line Items]                    
Number of shares purchased   75,000 75,000         75,000    
Warrants, expiration date     Feb. 28, 2020              
Unsecured Convertible Promissory Notes                    
Class of Stock [Line Items]                    
Conversion price   $ 0.75 $ 0.75              
Convertible notes, interest rate   7.00% 7.00%              
Convertible notes term     6 months              
Issuance of debt     $ 4,000,000              
Common Stock Warrants                    
Class of Stock [Line Items]                    
Number of shares purchased   1,061,586 1,061,586              
Exercise price of warrants, per share   $ 0.75 $ 0.75              
Warrant period     5 years              
Unsecured Convertible Promissory Note | Alpha Venture Capital Partners, L.P.                    
Class of Stock [Line Items]                    
Face amount of notes   $ 2,000,000 $ 2,000,000              
Convertible notes, interest rate   5.00% 5.00%              
Convertible note maturity date     Sep. 26, 2016              
Reduction in Conversion Price | Minimum                    
Class of Stock [Line Items]                    
Increase / Decrease in number of shares of common stock   3,500,000 3,500,000              
Reduction in Conversion Price | Maximum                    
Class of Stock [Line Items]                    
Increase / Decrease in number of shares of common stock   5,185,185 5,185,185              
Convertible Note One                    
Class of Stock [Line Items]                    
Conversion price $ 0.75 $ 0.75 $ 0.75     $ 0.75        
Convertible note, principal amount $ 6,208,250         $ 6,208,250        
Number of shares purchased   1,938,974 1,938,974              
Exercise price of warrants, per share   $ 2.00 $ 2.00              
Accrued but unpaid interest     $ 4,703              
Principal amount of notes converted     $ 1,175,000              
Common stock issued upon conversion of notes     1,556,667              
Payments on convertible notes payable     $ 3,793              
Convertible Note One | Reduction in Conversion Price                    
Class of Stock [Line Items]                    
Exercise price of warrants, per share   $ 0.55 $ 0.55              
Convertible Note Two                    
Class of Stock [Line Items]                    
Conversion price $ 0.65     $ 0.75   $ 0.65        
Convertible note, principal amount $ 380,000         $ 380,000        
Exercise price of warrants, per share       $ 1.00            
Accrued but unpaid interest       $ 86,296            
Principal amount of notes converted       $ 3,046,250            
Common stock issued upon conversion of notes       4,181,079            
Warrants to purchase shares of common stock       6,310,677            
Convertible notes term       7 months            
Convertible Note Three                    
Class of Stock [Line Items]                    
Conversion price         $ 0.75          
Principal amount of notes converted         $ 1,120,000          
Convertible Note Four                    
Class of Stock [Line Items]                    
Conversion price         $ 0.65          
Principal amount of notes converted         $ 350,000          
AVCP convertible note payable                    
Class of Stock [Line Items]                    
Payments on convertible notes payable         250,000          
Common Stock                    
Class of Stock [Line Items]                    
Number of common shares issued upon conversion of preferred stock             10      
Conversion price             $ 0.50      
Private Equity [Member]                    
Class of Stock [Line Items]                    
Principal amount of notes converted         $ 950,000          
Series B Convertible Preferred Stock                    
Class of Stock [Line Items]                    
Preferred Stock, Shares issued   95,100 95,100   95,100   400,000      
Preferred Stock, Share issuance price             $ 5.00      
Cash proceeds             $ 2,009,000      
Preferred stock shares outstanding   95,100 95,100   95,100