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Note 3 - Fair Value Measurements (Detail) - Changes in the Tap Participation Fee (USD $) | 12 Months Ended
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Aug. 31, 2012
Gross Estimated Tap Participation Fee Liability [Member] |
Balance at August 31, 2011 | $ 113,147,700
Total gains and losses (realized and unrealized): |
Purchases, sales, issuances, payments, and settlements | (189,700)
Balance at August 31, 2012 | 112,958,000
Tap Participation Fee Report Liability [Member] |
Balance at August 31, 2011 | 64,988,300
Total gains and losses (realized and unrealized): |
Imputed interest recorded as "Other Expense" | 3,470,500
Purchases, sales, issuances, payments, and settlements | (189,700)
Balance at August 31, 2012 | 68,269,100
Discount To Be Imputed As Interest Expense In Future Periods [Member] |
Balance at August 31, 2011 | 48,159,400
Total gains and losses (realized and unrealized): |
Imputed interest recorded as "Other Expense" | (3,470,500)
Balance at August 31, 2012 | $ 44,688,900

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- Definition Amount of purchases, sales, issues, and settlements (net) which have taken place in relation to assets measured at fair value on a recurring basis using unobservable inputs (level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 157 -Paragraph 32 -Subparagraph c(2) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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