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Note 6 - Net Income (Loss) Per-share (Tables)
3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
March 31
,
 
   
201
8
   
201
7
 
                 
Basic net income per share
:
 
 
 
 
 
 
 
 
Numerator:
               
Net income
  $
81
    $
254
 
Denominator:
               
Weighted-average shares of common stock outstanding
   
15,969
     
15,526
 
                 
Basic net income per share
  $
0.01
    $
0.02
 
                 
Diluted net income per share
:
 
 
 
 
 
 
 
 
Numerator:
               
Net income
  $
81
    $
254
 
Plus interest expense on convertible debt
   
-
     
2
 
    $
81
    $
256
 
Denominator:
               
Weighted-average shares of common stock outstanding
   
15,969
     
15,526
 
Dilutive options and warrants outstanding
   
2,910
     
-
 
Effect of conversion of convertible notes
   
-
     
13
 
Number of shares used in diluted per-share computation
   
18,879
     
15,539
 
                 
Diluted net income per share
  $
0.00
    $
0.02