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Note 19 - Earnings Per Share (Details Textual) - $ / shares
shares in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Convertible Series A Preferred Stock [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 2.0 2.0  
Warrant with Exercise Price of $14.93 [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1.8 1.8  
Share Price $ 14.93 $ 14.93  
Warrant with Exercise Price of $16.12 [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 1.8 1.8  
Share Price $ 16.12 $ 16.12  
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 4.8 2.2 1.6