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Commitments and Contingencies - Additional Information (Detail) (USD $)
3 Months Ended 3 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Home
May 31, 2013
Aug. 31, 2013
Minimum [Member]
May 31, 2013
Minimum [Member]
Aug. 31, 2013
Maximum [Member]
May 31, 2013
Maximum [Member]
Aug. 31, 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   $ 68,000,000 $ 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