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