CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) (USD $)	Feb. 29, 2012	Aug. 31, 2011
Current Assets:
Receivables, allowance for doubtful accounts	$ 4,000	$ 5,000
LIABILITIES AND EQUITY
Other long-term liabilities, fair value of derivative instruments	2,200,000	884,000
Other long-term liabilities, defined benefit plan	$ 561,000	$ 471,000
Equity:
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, authorized (in shares)	45,000,000	45,000,000
Common stock, issued (in shares)	30,840,358	30,695,933
Common stock, outstanding (in shares)	30,199,395	29,900,030
Treasury stock, shares (in shares)	640,963	795,903