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Note 5 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Goodwill, Ending Balance | $ 130,410 | $ 130,410 |
Goodwill, Impairment Loss | 0 | 0 |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) | 0 | 0 | $ 0
Finite-Lived Intangible Assets Acquired | $ 528 | $ 782 |
Customer Assets and Domain Names [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 7 years |  |
Finite-Lived Intangible Assets Acquired | $ 500 |  |
Minimum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 2 years |  |
Maximum [Member] |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 15 years |  |
Domain Services Operating Segment [Member] |  |  |
Goodwill, Ending Balance | $ 107,700 |  |
Goodwill Percentage Related to Operating Segments | 83.00% |  |
Network Access Services [Member] |  |  |
Goodwill, Ending Balance | $ 22,700 |  |
Goodwill Percentage Related to Operating Segments | 17.00% |  |

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