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Note 5 - Goodwill and Other Intangible Assets - Acquired Intangible Assets by Major Class (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Sep. 19, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Balances |  | $ 19,973,793 | $ 14,469,677 |
Finite-lived Intangible Assets Acquired |  | 319,694 | 6,529,654 |
Additions to/(disposals from) domain portfolio, net |  | (290,793) | (29,691) | $ (24,066)
Impairment of indefinite life intangible assets |  | (111,251) | (42,673) | (206,116)
Amortization expense |  | (8,399,936) | (953,174) | (262,726)
Reclassifications |  |  |  |
Balances |  | 58,414,178 | 19,973,793 | 14,469,677
eNom, Incorporated [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 44,300,000 |  |
Otono, Networks Inc. [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 2,622,670 |  |
Brand [Member] |  |  |  |
Balances |  | 5,210 | 79,670 |
Finite-lived Intangible Assets Acquired |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |
Impairment of indefinite life intangible assets |  |  |  |
Amortization expense |  | (1,656,040) | (74,460) |
Reclassifications |  | 43,620 |  |
Balances |  | 10,792,790 | 5,210 | 79,670
Brand [Member] | eNom, Incorporated [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 12,400,000 |  |
Brand [Member] | Otono, Networks Inc. [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |
Customer Relationships [Member] |  |  |  |
Balances |  | 6,198,811 | 499,854 |
Finite-lived Intangible Assets Acquired |  | 319,694 | 6,529,654 |
Additions to/(disposals from) domain portfolio, net |  |  |  |
Impairment of indefinite life intangible assets |  |  |  |
Amortization expense |  | (4,910,268) | (830,697) |
Reclassifications |  | (45,509) |  |
Balances |  | 32,185,398 | 6,198,811 | 499,854
Customer Relationships [Member] | eNom, Incorporated [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 28,000,000 |  |
Customer Relationships [Member] | Otono, Networks Inc. [Member] |  |  |  |
Finite-lived Intangible Assets Acquired | $ 2,600,000 | 2,622,670 |  |
Technology-Based Intangible Assets [Member] |  |  |  |
Balances |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |
Impairment of indefinite life intangible assets |  |  |  |
Amortization expense |  | (1,787,500) |  |
Reclassifications |  |  |  |
Balances |  | 2,112,500 |  |
Technology-Based Intangible Assets [Member] | eNom, Incorporated [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  | 3,900,000 |  |
Technology-Based Intangible Assets [Member] | Otono, Networks Inc. [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |
Network Rights [Member] |  |  |  |
Balances |  | 605,463 | 653,480 |
Finite-lived Intangible Assets Acquired |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |
Impairment of indefinite life intangible assets |  |  |  |
Amortization expense |  | (46,128) | (48,017) |
Reclassifications |  | 1,889 |  |
Balances |  | 561,224 | 605,463 | 653,480
Network Rights [Member] | eNom, Incorporated [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |
Network Rights [Member] | Otono, Networks Inc. [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |
Surname Domain Names [Member] |  |  |  |
Balances |  | 11,295,221 | 11,339,355 |
Finite-lived Intangible Assets Acquired |  |  |  |
Additions to/(disposals from) domain portfolio, net |  | (38,291) | (6,166) |
Impairment of indefinite life intangible assets |  |  | (37,968) |
Amortization expense |  |  |  |
Reclassifications |  |  |  |
Balances |  | 11,256,930 | 11,295,221 | 11,339,355
Surname Domain Names [Member] | eNom, Incorporated [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |
Acquisition , Indefinite-lived |  |  |  |
Direct Navigation Domain Names [Member] |  |  |  |
Balances |  | 1,869,088 | 1,897,318 |
Finite-lived Intangible Assets Acquired |  |  |  |
Additions to/(disposals from) domain portfolio, net |  | (252,501) | (23,525) |
Impairment of indefinite life intangible assets |  | (111,251) | (4,705) |
Amortization expense |  |  |  |
Reclassifications |  |  |  |
Balances |  | 1,505,336 | $ 1,869,088 | $ 1,897,318
Direct Navigation Domain Names [Member] | eNom, Incorporated [Member] |  |  |  |
Finite-lived Intangible Assets Acquired |  |  |  |
Acquisition , Indefinite-lived |  |  |  |

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- Definition Aggregate amount of indefinite life intangible assets recognized as cost of revenues, as a result of the disposal of these domain names, during the period. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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