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Note Receivable (Details) (USD $)
3 Months Ended 6 Months Ended
Nov. 30, 2012
Facilities
Nov. 30, 2012
Facilities
Note Receivable (Textual) [Abstract]    
Note receivable from sale of idle property, plant and equipment   $ 1,700,000
Note Receivable (Additional Textual) [Abstract]    
Note receivable interest rate   6.00%
Note receivable interest amortization period   20 years
Note receivable final payment period   6 years
Down payment received for sale of idle property, plant and equipment   500,000
Selling expenses paid for sale of idle property, plant and equipment   152,000
Recreational Vehicles [Member]
   
Note Receivable (Textual) [Abstract]    
Number of idle facilities sold 2 2
Cash received for facilities sold   348,000
Note receivable from sale of idle property, plant and equipment   $ 1,700,000
Facilities collateral for note   2