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Note 13 - Earnings Per Share (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Three Months Ended
 
   
March 31,
 
   
2019
   
2018
 
                 
Net income attributable to Alaska Communications
  $
227
    $
2,101
 
                 
Weighted average common shares outstanding:
               
Basic shares
   
53,382
     
52,681
 
Effect of stock-based compensation
   
1,223
     
1,176
 
Diluted shares
   
54,605
     
53,857
 
                 
Net income per share attributable to Alaska Communications:
               
Basic
  $
0.00
    $
0.04
 
Diluted
  $
0.00
    $
0.04