XML 73 R63.htm IDEA: XBRL DOCUMENT v2.4.1.9
Commitments and Contingencies - Additional Information (Detail) (USD $)
Nov. 30, 2014
Lawsuits
Commitments and Contingencies Disclosure [Line Items]  
Number of lawsuits 95us-gaap_LossContingencyPendingClaimsNumber
Insurance coverage subject to deductible limit $ 250,000us-gaap_LossContingencyEstimateOfPossibleLoss