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Note 9 - Other Long-term Liabilities (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Other Noncurrent Liabilities [Table Text Block]
   
2020
   
2019
 
Other deferred IRU capacity revenue, net of current portion
  $
35,201
    $
34,440
 
Deferred GCI capacity revenue, net of current portion
   
28,519
     
29,036
 
Other deferred revenue, net of current portion
   
4,541
     
4,825
 
Other
   
12,345
     
10,219
 
Total other long-term liabilities
  $
80,606
    $
78,520