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Note 5 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) |  |  | 12 Months Ended
--- | --- | --- | ---
Sep. 19, 2017 | Jan. 20, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Goodwill |  |  | $ 90,053,483 | $ 21,005,143 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 111,251 | 42,673 | $ 206,116
Finite-lived Intangible Assets Acquired |  |  | 319,694 | 6,529,654 |
Brand [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 7 years |  |
Finite-lived Intangible Assets Acquired |  |  |  |  |
Technology-Based Intangible Assets [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 2 years |  |
Finite-lived Intangible Assets Acquired |  |  |  |  |
Customer Relationships [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  |  | 7 years |  |
Finite-lived Intangible Assets Acquired |  |  | $ 319,694 | 6,529,654 |
Minimum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 4 years |  |
Minimum [Member] | Customer Relationships [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 4 years |  |
Maximum [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 15 years |  |
Maximum [Member] | Customer Relationships [Member] |  |  |  |  |
Finite-Lived Intangible Asset, Useful Life |  |  | 7 years |  |
Domain Name Services [Member] |  |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | $ 100,000 | $ 42,673 | $ 200,000
Domain Services Operating Segment [Member] |  |  |  |  |
Goodwill |  |  | $ 88,000,000 |  |
Goodwill Percentage Related to Operating Segments |  |  | 98.00% |  |
Network Access Services [Member] |  |  |  |  |
Goodwill |  |  | $ 2,100,000 |  |
Goodwill Percentage Related to Operating Segments |  |  | 2.00% |  |
eNom, Incorporated [Member] |  |  |  |  |
Goodwill |  | $ 69,048,340 |  |  |
Goodwill, Acquired During Period |  |  | $ 69,000,000 |  |
Finite-lived Intangible Assets Acquired |  |  | 44,300,000 |  |
eNom, Incorporated [Member] | Brand [Member] |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  | 7 years |  |  |
Finite-lived Intangible Assets Acquired |  |  | 12,400,000 |  |
eNom, Incorporated [Member] | Technology-Based Intangible Assets [Member] |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  | 2 years |  |  |
Finite-lived Intangible Assets Acquired |  |  | 3,900,000 |  |
eNom, Incorporated [Member] | Customer Relationships [Member] |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life |  | 7 years |  |  |
Finite-lived Intangible Assets Acquired |  |  | 28,000,000 |  |
Otono, Networks Inc. [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | 2,622,670 |  |
Business Acquisition, Working Capital Liabilities Assumed | $ 1,400,000 |  |  |  |
Otono, Networks Inc. [Member] | Brand [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |  |
Otono, Networks Inc. [Member] | Technology-Based Intangible Assets [Member] |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |  |
Otono, Networks Inc. [Member] | Customer Relationships [Member] |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 7 years |  |  |  |
Finite-lived Intangible Assets Acquired | $ 2,600,000 |  | $ 2,622,670 |  |

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