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Note 11 - Financial Instruments (Details)
£ in Millions, AUD in Millions
3 Months Ended
Mar. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2013
GBP (£)
Jun. 30, 2013
AUD
Note 11 - Financial Instruments (Details) [Line Items]          
Derivative, Amount of Hedged Item       £ 40.0 AUD 60.0
Other Current Liabilities [Member]          
Note 11 - Financial Instruments (Details) [Line Items]          
Derivative Assets (Liabilities), at Fair Value, Net     $ 272,000    
Derivative Liability   $ 2,400,000      
Forward Contracts [Member]          
Note 11 - Financial Instruments (Details) [Line Items]          
Proceeds from Hedge, Investing Activities $ 4,100,000