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Note 11 - Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
   
Nine Months Ended
 
   
September 30,
   
September 30,
 
   
2018
   
2017
   
2018
   
2017
 
                                 
Net income (loss) attributable to Alaska Communications
  $
1,817
    $
320
    $
7,360
    $
(3,154
)
                                 
Weighted average common shares outstanding:
                               
Basic shares
   
53,184
     
52,434
     
52,994
     
52,159
 
Effect of stock-based compensation
   
932
     
1,360
     
893
     
-
 
Diluted shares
   
54,116
     
53,794
     
53,887
     
52,159
 
                                 
Net income (loss) per share attributable to Alaska Communications:
                               
Basic
  $
0.03
    $
0.01
    $
0.14
    $
(0.06
)
Diluted
  $
0.03
    $
0.01
    $
0.14
    $
(0.06
)