Quarterly report pursuant to Section 13 or 15(d)

Rescission Liabilities - Additional Information (Detail)

v2.4.1.9
Rescission Liabilities - Additional Information (Detail) (USD $)
Nov. 30, 2014
May 31, 2014
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]    
Rescission liability $ 378,000us-gaap_LitigationReserveCurrent $ 378,000us-gaap_LitigationReserveCurrent