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Note 6 - Goodwill and Other Intangible Assets - Acquired Intangible Assets by Major Class (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | [2] | Sep. 30, 2018 | Sep. 30, 2017 | [2]
Balances | $ 53,693 |  | $ 58,414 | [1] |
Finite-lived intangible assets acquired | 113 |  | 114 |  |
Additions to/(disposals from) domain portfolio, net | (5) | $ (8) | (70) |  | $ (25)
Amortization expense | (2,296) | $ (2,245) | (6,953) |  | $ (6,070)
Finite-lived intangible assets acquired | 113 |  | 114 |  |
Balances | 51,505 |  | 51,505 |  |
Brand [Member] |  |  |  |  |
Balances | 9,892 |  | 10,793 |  |
Finite-lived intangible assets acquired |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (446) |  | (1,347) |  |
Finite-lived intangible assets acquired |  |  |  |  |
Balances | 9,446 |  | 9,446 |  |
Customer Relationships [Member] |  |  |  |  |
Balances | 29,429 |  | 32,186 |  |
Finite-lived intangible assets acquired | 113 |  | 114 |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (1,351) |  | (4,109) |  |
Finite-lived intangible assets acquired | 113 |  | 114 |  |
Balances | 28,191 |  | 28,191 |  |
Technology-Based Intangible Assets [Member] |  |  |  |  |
Balances | 1,138 |  | 2,113 |  |
Finite-lived intangible assets acquired |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (488) |  | (1,463) |  |
Finite-lived intangible assets acquired |  |  |  |  |
Balances | 650 |  | 650 |  |
Network Rights [Member] |  |  |  |  |
Balances | 538 |  | 561 |  |
Finite-lived intangible assets acquired |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (11) |  | (34) |  |
Finite-lived intangible assets acquired |  |  |  |  |
Balances | 527 |  | 527 |  |
Surname Domain Names [Member] |  |  |  |  |
Balances | 11,201 |  | 11,210 |  |
Finite-lived intangible assets acquired |  |  |  |  |
Additions to/(disposals from) domain portfolio, net | (2) |  | (11) |  |
Amortization expense |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  |
Balances | 11,199 |  | 11,199 |  |
Direct Navigation Domain Names [Member] |  |  |  |  |
Balances | 1,495 |  | 1,551 |  |
Finite-lived intangible assets acquired |  |  |  |  |
Additions to/(disposals from) domain portfolio, net | (3) |  | (59) |  |
Amortization expense |  |  |  |  |
Finite-lived intangible assets acquired |  |  |  |  |
Balances | $ 1,492 |  | $ 1,492 |  |
[1] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.
[2] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.

X
- 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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X
- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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