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Note 6 - Net Loss Per-share (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
March
31
,
  
   
20
20
    
201
9
  
                 
Basic net income (loss) per share
:
  
 
 
 
  
 
 
 
Numerator:
                
Net income (loss)
   $
(368
 )   $
(31
 )
Denominator:
                
Weighted-average shares of common stock outstanding
    
17,728
      
17,710
  
Basic net income (loss) per share
   $
(0.02
 )   $
0.00
  
                 
Diluted net income (loss) per share
:
  
 
 
 
  
 
 
 
Numerator:
                
Net income (loss)
   $
(368
 )   $
(31
 )
Less interest expense on convertible debt
    
-
      
-
  
    $
(368
 )   $
(31
)
Denominator:
                
Weighted-average shares of common stock outstanding
    
17,728
      
17,710
  
Dilutive options and warrants outstanding
    
-
      
-
  
Number of shares used in diluted per-share computation
    
17,728
      
17,710
  
                 
Diluted net income (loss) per share
   $
(0.02
 )   $
0.00