Accrued Expenses (Details) (USD $)	Nov. 30, 2012	Aug. 31, 2012	Feb. 29, 2012
Accrued expenses and other liabilities
Payroll and related employee benefits	$ 383,000		$ 510,000
Income taxes	7,000		17,000
Property taxes			7,000
Environmental liabilities	10,000	10,000	13,000
Other liabilities	18,000		5,000
Accrued expenses, Total	$ 418,000		$ 552,000