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Note 6 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Jun. 30, 2025 | Dec. 31, 2024
Goodwill | $ 130,410 |  | $ 130,410 |  |  | $ 130,410
Goodwill, Impairment Loss | 0 | $ 0 | 0 | $ 0 |  |
Finite-Lived Intangible Assets Acquired |  |  | 206 |  |  |
Customer Assets and Domain Names [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  | 7 years |
Finite-Lived Intangible Assets Acquired | $ 0 |  | $ 200 |  |  |
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 |  |  |
Weighted Average [Member] |  |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) | 5 years 4 months 24 days |  | 5 years 4 months 24 days |  |  |
Domain Services Operating Segment [Member] |  |  |  |  |  |
Goodwill |  |  |  |  | $ 107,700 |
Goodwill Percentage Related to Operating Segments |  |  |  |  | 83.00% |
Network Access Services [Member] |  |  |  |  |  |
Goodwill |  |  |  |  | $ 22,700 |
Goodwill Percentage Related to Operating Segments |  |  |  |  | 17.00% |

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