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Note 10 - Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2015
Earnings Per Share [Abstract]  
Schedule of Weighted Average Number of Shares [Table Text Block]
(in millions of shares)
 
Three Months Ended
September 30,
   
Nine Months
Ended
September 30,
 
   
2015
   
2015
   
2014
 
Unvested share-based awards
    0.2       0.2       0.3  
Detachable warrants to purchase common shares
    -       0.4       1.7  
   Total
    0.2       0.6       2.0  
                         
(in millions of shares)
 
Three Months Ended
September 30,
 
   
2014
 
Unvested share-based awards
    0.2  
Detachable warrants to purchase common shares
    1.3  
   Total
    1.5