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Note 5 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Goodwill, Ending Balance |  | $ 130,410 | $ 130,410 | $ 116,304
Goodwill, Impairment Loss | $ 0 | 0 |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) |  | 0 |  |
Impairment of Intangible Assets, Finite-Lived |  | $ 0 | $ 0 | 1,431
Customer Assets and Domain Names [Member] |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 7 years |  |
Customer Relationship [Member] |  |  |  |
Impairment of Intangible Assets, Finite-Lived |  |  |  | $ 1,400
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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