Annual report pursuant to section 13 and 15(d)

Subsequent Events - Additional Information (Detail)

v2.4.0.8
Subsequent Events - Additional Information (Detail) (USD $)
 12 Months Ended 1 Months Ended
May 31, 2013
May 31, 2010
May 31, 2013
Minimum
May 31, 2013
Convertible Debt
Aug. 30, 2013
Subsequent Event
Convertible Debt
Jul. 31, 2013
Subsequent Event
Unsecured Convertible Promissory Notes
Jul. 31, 2013
Subsequent Event
Unsecured Convertible Promissory Notes
Sale of Note Payable
Jul. 31, 2013
Subsequent Event
Unsecured Convertible Promissory Notes
If Converted
Jul. 31, 2013
Subsequent Event
Unsecured Convertible Promissory Notes
Minimum
Subsequent Event [Line Items]                  
Issuance of promissory notes           $ 1,200,000      
Interest rate on notes     5.00%     5.00%      
Maturity date           Feb. 01, 2014      
Proceeds from sale of securities           3,000,000      
Convertible note conversion price Trigger per share           $ 0.65      
Conversion price decrease per share           $ 0.10      
Convertible note conversion price per share     $ 0.65   $ 0.75       $ 0.35
Warrant exercise period           3 years      
Warrants issued to purchase common stock           923,072      
Common stock warrant exercise price             0.50 0.75  
Value Of Warrants           1.30      
Class of warrant term           5 years      
Cash fee paid to a registered broker-dealer           120,000      
Principal amount of notes 6,588,250     6,021,250 920,000        
Aggregate principal amount plus accrued but unpaid interest $ 567,000 $ 146,456     $ 12,071        
Common stock issued         1,242,762