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Note 6 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 19, 2017 | Jan. 20, 2017 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016
Goodwill |  |  | $ 87,486,243 |  | $ 87,486,243 |  | $ 21,005,143
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 1,500 | $ 2,866 | 1,500 | $ 27,745 |
Finite-lived Intangible Assets Acquired |  |  | 90,187 |  | 90,187 |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  |  | 13,000,000 |  | 13,000,000 |  |
Brand [Member] |  |  |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |  |  |  |
Technology-Based Intangible Assets [Member] |  |  |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |  |  |  |
Customer Relationships [Member] |  |  |  |  |  |  |
Finite-lived Intangible Assets Acquired |  |  | 90,187 |  | 90,187 |  |
Domain Name Services [Member] |  |  |  |  |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 1,500 | 2,866 | 1,500 | 27,745 |
Domain Services Operating Segment [Member] |  |  |  |  |  |  |
Goodwill |  |  | $ 85,400,000 |  | $ 85,400,000 |  |
Goodwill Percentage Related to Operating Segments |  |  | 98.00% |  | 98.00% |  |
Network Access Services [Member] |  |  |  |  |  |  |
Goodwill |  |  | $ 2,100,000 |  | $ 2,100,000 |  |
Goodwill Percentage Related to Operating Segments |  |  | 2.00% |  | 2.00% |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  |  |  |  |  |
eNom, Incorporated [Member] |  |  |  |  |  |  |
Goodwill |  | $ 66,481,100 |  |  |  |  |
Goodwill, Acquired During Period |  |  |  |  | 66,500,000 |  |
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 |  |  | 2,294,111 |  | 2,294,111 |  |
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 | $ 2,300,000 |  | $ 2,294,111 |  | $ 2,294,111 |  |

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