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Note 10 - Revenue (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Disaggregation of Revenue [Table Text Block]
   
Three months ended March 31,
 
   
2019
   
2018
(1)
 
Network Access Services:
               
Mobile Services
  $
20,809
    $
21,872
 
Other Services
   
2,443
     
1,736
 
Total Network Access Services
   
23,252
     
23,608
 
                 
Domain Services
               
Wholesale
               
Domain Services
   
42,591
     
58,428
 
Value Added Services
   
4,184
     
4,434
 
Total Wholesale
   
46,775
     
62,862
 
                 
Retail
   
8,642
     
8,436
 
Portfolio
   
284
     
889
 
Total Domain Services
   
55,701
     
72,187
 
                 
    $
78,953
    $
95,795
 
Schedule of Cost of Revenues by Revenue Stream [Table Text Block]
   
Three months ended March 31,
 
   
2019
   
2018
(1)
 
Network Access Services:
               
Mobile Services
  $
10,743
    $
11,266
 
Other Services
   
1,069
     
941
 
Total Network Access Services
   
11,812
     
12,207
 
                 
Domain Services
               
Wholesale
               
Domain Services
   
34,839
     
51,314
 
Value Added Services
   
794
     
857
 
Total Wholesale
   
35,633
     
52,171
 
                 
Retail
   
4,359
     
4,409
 
Portfolio
   
128
     
185
 
Total Domain Services
   
40,120
     
56,765
 
                 
Network Expenses:
               
Network, other costs
   
2,395
     
2,574
 
Network, depreciation and amortization costs
   
1,975
     
1,630
 
     
4,370
     
4,204
 
                 
    $
56,302
    $
73,176
 
Contract with Customer, Asset and Liability [Table Text Block]
   
Three months ended
March 31, 2019
 
Balance, beginning of period
  $
143,694
 
Acquired in a business combination
1
   
12,456
 
Deferred revenue
   
59,991
 
Recognized revenue
2
   
(56,722
)
Balance, end of period
  $
159,419