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Note 11 - Net Income (Loss) Attributable to Controlling Interests Per Common Share (Tables)
 3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the Three Months Ended March 31,
 
   
2019
    
2018
  
Numerator:
                
Net income (loss) attributable to controlling interests
   $
5,713
     $
(4,670
 )
Denominator:
                
Basic (including unvested share-based payment awards) (1)
    
14,355
      
13,899
  
Effect of dilutive stock compensation arrangements (2)
    
362
      
—
  
Diluted (including unvested share-based payment awards) (1)
    
14,717
      
13,899
  
Net income (loss) attributable to controlling interests per common share—basic
   $
0.40
     $
(0.34
 )
Net income (loss) attributable to controlling interests per common share—diluted
   $
0.39
     $
(0.34
 )