Note 5. Cash and Cash Equivalents (Detail) (USD $)	3 Months Ended
	Nov. 30, 2011		Aug. 31, 2011
Short-term Investments	$ 15.0
Investment Income, Interest	100,000
Investment Owned, at Fair Value	$ 13,792,000	[1]	$ 0

[1] The Company's certificates of deposit held for investment are not debt securities and are classified as Level 2. These certificates of deposit have original maturities greater than three months, but less than one year and, as such, are classified as investments (short-term) on the Company's consolidated balance sheet.