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Note 5 - Goodwill and Other Intangible Assets (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Goodwill, Ending Balance $ 130,410   $ 130,410   $ 130,410
Goodwill, Impairment Loss 0 $ 0 0 $ 0  
Finite-Lived Intangible Assets Acquired $ 32   $ 415    
Customer Assets and Domain Names [Member]          
Finite-Lived Intangible Asset, Useful Life (Year) 7 years   7 years    
Finite-Lived Intangible Assets Acquired $ 100   $ 400    
Minimum [Member]          
Finite-Lived Intangible Asset, Useful Life (Year) 2 years   2 years    
Maximum [Member]          
Finite-Lived Intangible Asset, Useful Life (Year) 15 years   15 years    
Domain Services Operating Segment [Member]          
Goodwill, Ending Balance $ 107,700   $ 107,700    
Goodwill Percentage Related to Operating Segments 83.00%   83.00%    
Network Access Services [Member]          
Goodwill, Ending Balance $ 22,700   $ 22,700    
Goodwill Percentage Related to Operating Segments 17.00%   17.00%