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Note 5 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Goodwill, Ending Balance | $ 130,410 | $ 130,410 | $ 116,304
Goodwill, Impairment Loss | 0 |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) | 0 | 0 | 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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- Definition Represents the percentage of goodwill in relation to the company's operating segments. + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 55 -Paragraph 24 -URI https://asc.fasb.org/extlink&oid=122137925&loc=d3e14258-109268 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(15)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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