Accrued Expenses (Details) (USD $)	Aug. 31, 2012	Feb. 29, 2012
Accrued expenses and other liabilities
Payroll and related employee benefits	$ 367,000	$ 510,000
Income taxes	23,000	17,000
Property taxes	29,000	7,000
Environmental liabilities	10,000	13,000
Other liabilities	8,000	5,000
Accrued expenses, Total	$ 437,000	$ 552,000