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Note 6 - Goodwill and Other Intangible Assets - Acquired Intangible Assets by Major Class (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Balances | $ 47,444 |
Acquisition | 154 |
Additions to/(disposals from) domain portfolio, net | (1) | $ (13)
Amortization expense | (2,619) | $ (3,301)
Balances | 44,978 |
Brand [Member] |  |
Balances | 7,021 |
Amortization expense | (518) |
Balances | 6,503 |
Customer Relationships [Member] |  |
Balances | 26,664 |
Acquisition | 154 |
Amortization expense | (1,802) |
Balances | 25,016 |
Technology-Based Intangible Assets [Member] |  |
Balances | 274 |
Amortization expense | (274) |
Balances | 0 |
Network Rights [Member] |  |
Balances | 1,193 |
Amortization expense | (25) |
Balances | 1,168 |
Surname Domain Names [Member] |  |
Balances | 11,157 |
Additions to/(disposals from) domain portfolio, net | (1) |
Balances | 11,156 |
Direct Navigation Domain Names [Member] |  |
Balances | 1,135 |
Additions to/(disposals from) domain portfolio, net | 0 |
Balances | $ 1,135 |

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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Balance Type: | debit
Period Type: | duration

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=121586364&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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X
- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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