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Note 11 - Revenue 1 (Details Textual) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 01, 2021 | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Jan. 01, 2023 USD ($)
Revenue from Contract with Customer, Including Assessed Tax |  | $ 339,337 | $ 321,142 | $ 304,337 |
Contract with Customer, Liability |  | $ 148,083 | 145,131 |  | $ 145,100
Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 2 years |  |  |
Minimum [Member] | Active Domain Name Contracts [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 1 year |  |  |
Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 15 years |  |  |
Maximum [Member] | Active Domain Name Contracts [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life (Year) |  | 10 years |  |  |
Mobile Platform Services [Member] | Operating Segments [Member] |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | $ 38,670 | $ 24,344 | $ 16,781 |
Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |  |  |
Number of Customers | 1 | 1 | 1 |  |
Customer Concentration Risk [Member] | Accounts Receivable [Member] | One Customer [Member] |  |  |  |  |
Concentration Risk, Percentage |  | 39.00% | 46.00% | 46.00% |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] |  |  |  |  |
Number of Customers |  |  | 0 | 0 |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Mobile Platform Services [Member] | Operating Segments [Member] |  |  |  |  |
Number of Customers |  | 1 |  |  |
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | One Customer [Member] | Mobile Platform Services [Member] | Operating Segments [Member] |  |  |  |  |
Concentration Risk, Percentage |  | 10.70% |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  | $ 36,200 |  |  |

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