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Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2012	Aug. 31, 2011	Aug. 31, 2010	Aug. 31, 2009
Cash and Cash Equivalents
Total cash and cash equivalents	$ 47,228	$ 83,619	$ 13,520	$ 13,715
Short-term Investments
Short-term investments	8,831
Cash and demand deposits
Cash and Cash Equivalents
Total cash and cash equivalents	36,218	76,619
Time deposits
Cash and Cash Equivalents
Total cash and cash equivalents	6,000
Certificates of deposits
Cash and Cash Equivalents
Total cash and cash equivalents		2,000
Money market funds
Cash and Cash Equivalents
Total cash and cash equivalents	$ 5,010	$ 5,000

X

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Other investments not otherwise specified in the taxonomy that will be realized in a short period of time, usually less than one year or the normal operating cycle, whichever is longer.

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