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Note 10 - Revenue - Cost of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Network, other costs $ 3,238 $ 2,416
Impairment of property and equipment 60 0
Cost of revenue 53,422 58,835
Network Expenses [Member]    
Network, other costs 3,238 2,416
Network, depreciation and amortization costs 3,937 3,231
Impairment of property and equipment 60 0
Cost of revenue 7,235 5,647
Network Access Services [Member] | Mobile Services [Member]    
Cost of revenue 2,779 9,857
Network Access Services [Member] | Fiber Internet Services [Member]    
Cost of revenue 2,635 1,716
Network Access Services [Member] | Retail Mobile Services [Member] | Mobile Services [Member]    
Cost of revenue 1,055 9,857
Network Access Services [Member] | Mobile Platform Services [Member] | Mobile Services [Member]    
Cost of revenue 58 0
Network Access Services [Member] | Other Services [Member] | Mobile Services [Member]    
Cost of revenue 1,666 0
Domain Name Services [Member]    
Cost of revenue 40,773 41,615
Domain Name Services [Member] | Wholesale [Member]    
Cost of revenue 36,372 37,226
Domain Name Services [Member] | Retail Services [Member]    
Cost of revenue 4,401 4,389
Domain Name Services [Member] | Domain Services [Member] | Wholesale [Member]    
Cost of revenue 35,773 36,469
Domain Name Services [Member] | Value Added Services [Member] | Wholesale [Member]    
Cost of revenue $ 599 $ 757