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Note 6 - Goodwill and Other Intangible Assets - Acquired Intangible Assets by Major Class (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Sep. 19, 2017 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Balances |  | $ 60,432,167 |  | $ 19,973,793 |
Acquisition , Finite-lived |  | 90,187 |  | 90,187 |
Additions to/(disposals from) domain portfolio, net |  | (7,896) | $ (4,760) | (24,661) | $ (25,581)
Amortization expense |  | (2,244,955) | $ (292,547) | (6,069,817) | $ (649,526)
Balances |  | 60,562,113 |  | 60,562,113 |
Reclassifications |  |  |  |  |
Otono, Networks Inc. [Member] |  |  |  |  |
Acquisition , Finite-lived |  | 2,294,111 |  | 2,294,111 |
eNom, Incorporated [Member] |  |  |  |  |
Acquisition , Finite-lived |  |  |  | 44,300,000 |
Brand [Member] |  |  |  |  |
Balances |  | 11,693,810 |  | 5,210 |
Acquisition , Finite-lived |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense |  | (450,510) |  | (1,205,530) |
Balances |  | 11,243,300 |  | 11,243,300 |
Reclassifications |  |  |  | 43,620 |
Brand [Member] | Otono, Networks Inc. [Member] |  |  |  |  |
Acquisition , Finite-lived |  |  |  |  |
Brand [Member] | eNom, Incorporated [Member] |  |  |  |  |
Acquisition , Finite-lived |  |  |  | 12,400,000 |
Customer Relationships [Member] |  |  |  |  |
Balances |  | 31,919,024 |  | 6,198,811 |
Acquisition , Finite-lived |  | 90,187 |  | 90,187 |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense |  | (1,295,413) |  | (3,529,691) |
Balances |  | 33,007,909 |  | 33,007,909 |
Reclassifications |  |  |  | (45,509) |
Customer Relationships [Member] | Otono, Networks Inc. [Member] |  |  |  |  |
Acquisition , Finite-lived | $ 2,300,000 | 2,294,111 |  | 2,294,111 |
Customer Relationships [Member] | eNom, Incorporated [Member] |  |  |  |  |
Acquisition , Finite-lived |  |  |  | 28,000,000 |
Technology-Based Intangible Assets [Member] |  |  |  |  |
Balances |  | 3,087,500 |  |  |
Acquisition , Finite-lived |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense |  | (487,500) |  | (1,300,000) |
Balances |  | 2,600,000 |  | 2,600,000 |
Reclassifications |  |  |  |  |
Technology-Based Intangible Assets [Member] | Otono, Networks Inc. [Member] |  |  |  |  |
Acquisition , Finite-lived |  |  |  |  |
Technology-Based Intangible Assets [Member] | eNom, Incorporated [Member] |  |  |  |  |
Acquisition , Finite-lived |  |  |  | 3,900,000 |
Network Rights [Member] |  |  |  |  |
Balances |  | 584,288 |  | 605,463 |
Acquisition , Finite-lived |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense |  | (11,532) |  | (34,596) |
Balances |  | 572,756 |  | 572,756 |
Reclassifications |  |  |  | 1,889 |
Network Rights [Member] | Otono, Networks Inc. [Member] |  |  |  |  |
Acquisition , Finite-lived |  |  |  |  |
Network Rights [Member] | eNom, Incorporated [Member] |  |  |  |  |
Acquisition , Finite-lived |  |  |  |  |
Surname Domain Names [Member] |  |  |  |  |
Balances |  | 11,291,003 |  | 11,295,221 |
Acquisition , Indefinite-lived |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  | (1,623) |  | (5,841) |
Amortization expense |  |  |  |  |
Balances |  | 11,289,380 |  | 11,289,380 |
Reclassifications |  |  |  |  |
Surname Domain Names [Member] | Otono, Networks Inc. [Member] |  |  |  |  |
Acquisition , Indefinite-lived |  |  |  |  |
Acquisition , Finite-lived |  |  |  |  |
Surname Domain Names [Member] | eNom, Incorporated [Member] |  |  |  |  |
Acquisition , Indefinite-lived |  |  |  |  |
Direct Navigation Domain Names [Member] |  |  |  |  |
Balances |  | 1,856,542 |  | 1,869,088 |
Acquisition , Indefinite-lived |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  | (7,774) |  | (20,320) |
Amortization expense |  |  |  |  |
Balances |  | 1,848,768 |  | 1,848,768 |
Reclassifications |  |  |  |  |
Direct Navigation Domain Names [Member] | Otono, Networks Inc. [Member] |  |  |  |  |
Acquisition , Indefinite-lived |  |  |  |  |
Acquisition , Finite-lived |  |  |  |  |
Direct Navigation Domain Names [Member] | eNom, Incorporated [Member] |  |  |  |  |
Acquisition , Indefinite-lived |  |  |  |  |

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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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