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Note 7 - Net Loss Per Common Share (Tables)
 3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Month Period Ended
  
   
March 31,
  
(In thousands, except per share and share data)
  
2019
    
2018
  
Numerator:
                
Net income (loss) attributable to common stockholders
   $
427
     $
(103
)
                 
Denominator:
                
Weighted average basic shares outstanding
    
18,648,397
      
14,098,610
  
Effect of dilutive securities
    
5,710,078
      
—
  
Weighted average diluted shares
    
24,358,475
      
14,098,610
  
                 
Basic earnings per share
   $
0.02
     $
(0.01
)
Diluted earnings per share
   $
0.02
     $
(0.01
)