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Commitments and Contingencies - Additional Information (Detail) (USD $)
 6 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Nov. 30, 2013
Home
Nov. 30, 2012
May 31, 2013
Nov. 30, 2013
Minimum [Member]
May 31, 2013
Minimum [Member]
Nov. 30, 2013
Maximum [Member]
May 31, 2013
Maximum [Member]
Nov. 30, 2013
Certificate of Deposit [Member]
Loss Contingencies [Line Items]                
Period to potentially repurchase units       12 months 12 months 24 months 24 months  
Maximum potential repurchase liability $ 65,000,000   $ 71,000,000          
Other accrued liabilities 100,000   100,000          
Obligations from repurchased units 0 0            
Net losses from repurchased units 0 0            
Certificate of deposit pledged               $ 600,000
Number of homes to be manufactured and sold 60