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Note 18 - Earnings Per Share (Details Textual) - USD ($)
$ in Millions
4 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2015
Dec. 31, 2014
Employee Stock Option [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0 100,000 100,000
Convertible Debt Securities [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Aggregate Principal Amount of Convertible Security Convertible Senior Notes (in Dollars) $ 400