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Note 10 - Revenue - Cost of Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Cost of revenues | $ 232,103 | $ 230,600 | [1] | $ 120,187 | [1]
Network, other costs | 9,846 | 9,324 | [1] | 5,210 | [1]
| 249,243 | 244,900 | [1] | 126,765 | [1]
Network Expenses [Member] |  |  |  |  |
Network, other costs | 9,846 | 9,324 |  | 5,210 |
Network, depreciation and amortization costs | 7,294 | 4,976 |  | 1,368 |
| 17,140 | 14,300 |  | 6,578 |
Network Access Services [Member] |  |  |  |  |
Cost of revenues | 50,055 | 48,640 |  | 37,825 |
Network, other costs | 2,029 | 1,861 |  | 1,399 |
| 56,193 | 52,748 |  | 40,249 |
Network Access Services [Member] | Mobile Services [Member] |  |  |  |  |
Cost of revenues | 46,061 | 45,335 |  | 35,915 |
Network Access Services [Member] | Other Services [Member] |  |  |  |  |
Cost of revenues | 3,994 | 3,305 |  | 1,910 |
Domain Name Services [Member] |  |  |  |  |
Cost of revenues | 182,048 | 181,960 |  | 82,362 |
Network, other costs | 7,817 | 7,463 |  | 3,811 |
| 193,050 | 192,152 |  | 86,516 |
Domain Name Services [Member] | Wholesale [Member] |  |  |  |  |
Cost of revenues | 163,370 | 163,463 |  | 74,980 |
Domain Name Services [Member] | Retail Services [Member] |  |  |  |  |
Cost of revenues | 17,725 | 17,346 |  | 6,766 |
Domain Name Services [Member] | Portfolio [Member] |  |  |  |  |
Cost of revenues | 953 | 1,151 |  | 616 |
Domain Name Services [Member] | Domain Services [Member] | Wholesale [Member] |  |  |  |  |
Cost of revenues | 160,216 | 161,013 |  | 72,948 |
Domain Name Services [Member] | Value Added Services [Member] | Wholesale [Member] |  |  |  |  |
Cost of revenues | $ 3,154 | $ 2,450 |  | $ 2,032 |
[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.

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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