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Note 9 - Derivative Financial Instruments - Foreign Currency Exchange Contracts (Details) - Foreign Exchange Contract [Member]
€ in Thousands, £ in Thousands, MXN in Millions, CAD in Millions, $ in Millions
Dec. 31, 2017
USD ($)
Dec. 31, 2017
CAD
Dec. 31, 2017
GBP (£)
Dec. 31, 2017
EUR (€)
Dec. 31, 2017
MXN
Jun. 30, 2017
USD ($)
Jun. 30, 2017
CAD
Jun. 30, 2017
GBP (£)
Jun. 30, 2017
EUR (€)
Jun. 30, 2017
MXN
United States of America, Dollars                    
Derivative, Notional Amount | $ $ 69         $ 73        
Euro Member Countries, Euro                    
Derivative, Notional Amount | €       € 21,312         € 21,335  
United Kingdom, Pounds                    
Derivative, Notional Amount | £     £ 6,750         £ 6,962    
Mexico, Pesos                    
Derivative, Notional Amount | MXN         MXN 54         MXN 54
Canada, Dollars                    
Derivative, Notional Amount | CAD   CAD 20.6         CAD 20.6