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Restricted Cash - Additional Information (Detail) (USD $)
May 31, 2014
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May 31, 2013
Home
Restricted Cash and Cash Equivalents Items [Line Items]    
Homes to be manufactured 60 60
Agreement to sell to second dealer   60
Security deposit   $ 600,000
Certificate of Deposit [Member]
   
Restricted Cash and Cash Equivalents Items [Line Items]    
Security deposit   $ 600,000