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Note 4 - Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
Estimated
   
December 31,
 
   
Life
   
2018
   
201
7
 
                             
Land
   
 
 
 
    $
1,164
    $
1,164
 
Building and improvements
   
20
-
40
     
13,196
     
12,999
 
Telephone equipment
   
6
-
20
     
243,346
     
239,539
 
Cable television equipment
   
 
7
 
     
12,682
     
12,417
 
Furniture and equipment
   
8
-
14
     
3,066
     
3,087
 
Vehicles
   
7
-
9
     
6,906
     
6,992
 
Computer software equipment
   
5
-
7
     
19,764
     
16,830
 
Internet equipment
   
 
5
 
     
3,933
     
3,940
 
Total property and equipment
   
 
 
 
     
304,057
     
296,968
 
Accumulated depreciation and amortization
   
 
 
 
     
(251,984
)
   
(246,080
)
Net property and equipment
   
 
 
 
    $
52,073
    $
50,888