Note 15 - Income Taxes (Details) - Major Tax Jurisdictions in Which the Company and Affiliates Operate and the Earliest Tax Year Subject to Examination	9 Months Ended
	May. 31, 2015
Minimum [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
U.S.
Open Tax Years	2013
Minimum [Member] | State and Local Jurisdiction [Member] | State (Various) [Member]
U.S.
Open Tax Years	2011
Minimum [Member] | Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
U.S.
Open Tax Years	2012
Minimum [Member] | Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
U.S.
Open Tax Years	2013
Maximum [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
U.S.
Open Tax Years	2015
Maximum [Member] | State and Local Jurisdiction [Member] | State (Various) [Member]
U.S.
Open Tax Years	2015
Maximum [Member] | Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
U.S.
Open Tax Years	2015
Maximum [Member] | Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
U.S.
Open Tax Years	2015