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Note 21 - Earnings Per Share (Details Textual) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Series A Preferred Stock      
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
Series B Preferred Stock [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Antidilutive securities excluded from computation of earnings per share, amount 1.0    
Series C Preferred Stock [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Antidilutive securities excluded from computation of earnings per share, amount 1.0    
Convertible Notes [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Antidilutive securities excluded from computation of earnings per share amount, value $ 25   $ 100
Restricted Stock Units [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Dilutive securities included from computation of earnings per share, amount   0.6 0.6
Stock Options [Member]      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Antidilutive securities excluded from computation of earnings per share, amount 2.9 4.0 6.8
Dilutive securities excluded in computation of earnings per share, amount   0.7