Annual report pursuant to Section 13 and 15(d)

Accrued Liabilities, Other Current Liabilities and Other Liabilities (Detail)

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Accrued Liabilities, Other Current Liabilities and Other Liabilities (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Jul. 31, 2012
Jul. 31, 2011
Self Insurance Reserve, Current $ 0.4 $ 0.4
Long-term Debt, Gross 0.2  
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum 0.00%  
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum 4.82%  
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 0.1  
Long-term Debt, Maturities, Repayments of Principal in Year Two 0.1  
Long-term Debt, Maturities, Repayments of Principal in Year Three 0.03  
Long-term Debt, Maturing in Years Two and Three $ 0.2