Note 4 - Fair Value Measures (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Nov. 30, 2013
Disclosure Text Block [Abstract]
Interest Income and Fees, Bankers Acceptances, Certificates of Deposit and Commercial Paper	$ 0.3

Interest and fee income derived from banker's acceptances, certificates of deposit and commercial paper.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.4)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 4

-Article 9

Name:	us-gaap_InterestIncomeAndFeesBankersAcceptancesCertificatesOfDepositAndCommercialPaper
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration