Note 15 - Major Tax Jurisdictions in Which the Company and Affiliates Operate and the Earliest Tax Year Subject to Examination (Details)	3 Months Ended
	Nov. 30, 2015
Earliest Tax Year [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Years	2013
Earliest Tax Year [Member] | Domestic Tax Authority [Member] | State, Various [Member]
Open Tax Years	2010
Earliest Tax Year [Member] | Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Open Tax Years	2013
Earliest Tax Year [Member] | Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Open Tax Years	2012
Latest Tax Year [Member] | Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Open Tax Years	2016
Latest Tax Year [Member] | Domestic Tax Authority [Member] | State, Various [Member]
Open Tax Years	2016
Latest Tax Year [Member] | Foreign Tax Authority [Member] | Ministry of the Economy, Finance and Industry, France [Member]
Open Tax Years	2016
Latest Tax Year [Member] | Foreign Tax Authority [Member] | Her Majesty's Revenue and Customs (HMRC) [Member]
Open Tax Years	2016