Quarterly report pursuant to Section 13 or 15(d)

Proxy Contest - Additional Information (Detail)

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Proxy Contest - Additional Information (Detail) (USD $)
 1 Months Ended 3 Months Ended 6 Months Ended 1 Months Ended
Oct. 25, 2011
May 31, 2012
May 31, 2013
Participant
May 31, 2012
Nov. 30, 2012
May 30, 2012
Directors
Aug. 25, 2011
May 09, 2011
Directors
Jun. 14, 2013
Subsequent Event [Member]
Number of directors nominated           6   5  
Cash transferred to trust             $ 2,500,000    
Legal fees paid     41,287 49,367          
Balance in the trust     2,302,185   2,372,439        
Total number of participants     3            
Claim amount of employment agreement and defamation 5,000,000                
Claim amount covered under insurance 1,000,000                
Claim settlement amount                 1,080,938
Claim settlement amount related to lost salary, bonuses, benefits                 980,938
Claim settlement amount related to defamation                 100,000
Accrued expense related to lost salary, bonuses and benefits     1,630,000   1,450,000        
Stock option compensation expense   $ 700,000   $ 700,000