Note 15 - Income Taxes (Details) - Major Tax Jurisdictions in Which the Company and Affiliates Operate and the Earliest Tax Year Subject to Examination	3 Months Ended
	Nov. 30, 2014
Domestic Tax Authority [Member] | Minimum [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Open Tax Years	2013
Domestic Tax Authority [Member] | Maximum [Member] | Internal Revenue Service (IRS) [Member]
Income Tax Examination [Line Items]
Open Tax Years	2015
State and Local Jurisdiction [Member] | Minimum [Member] | State (Various) [Member]
Income Tax Examination [Line Items]
Open Tax Years	2011
State and Local Jurisdiction [Member] | Maximum [Member] | State (Various) [Member]
Income Tax Examination [Line Items]
Open Tax Years	2015
Foreign Tax Authority [Member] | Minimum [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Income Tax Examination [Line Items]
Open Tax Years	2012
Foreign Tax Authority [Member] | Minimum [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Income Tax Examination [Line Items]
Open Tax Years	2013
Foreign Tax Authority [Member] | Maximum [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Income Tax Examination [Line Items]
Open Tax Years	2015
Foreign Tax Authority [Member] | Maximum [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Income Tax Examination [Line Items]
Open Tax Years	2015