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Note 5 - Goodwill and Other Intangible Assets - Acquired Intangible Assets by Major Class (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Balances | $ 49,395 | [1] | $ 58,414 |  |
Acquisition of customer relationships | 91 |  | 565 |  |
Additions to/(disposals from) domain portfolio, net | (115) |  | (341) | [2] | $ (291)
Amortization expense | (10,333) |  | (9,243) | [2] | (8,400)
Additions to/(disposals from) domain portfolio, net | (115) |  | (341) | [2] | (291)
Amortization expense | (10,333) |  | (9,243) | [2] | (8,400)
Balances | 57,654 |  | 49,395 | [1] | 58,414
Ascio Technologies, Inc. [Member] |  |  |  |  |
Acquisition of customer relationships | 15,140 |  |  |  |
FreedomPop and Unreal Mobile [Member] |  |  |  |  |
Acquisition of customer relationships | 3,475 |  |  |  |
Brand [Member] |  |  |  |  |
Balances | 9,004 |  | 10,793 |  |
Acquisition of customer relationships |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (2,003) |  | (1,789) |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (2,003) |  | (1,789) |  |
Balances | 9,091 |  | 9,004 |  | 10,793
Brand [Member] | Ascio Technologies, Inc. [Member] |  |  |  |  |
Acquisition of customer relationships | 2,090 |  |  |  |
Brand [Member] | FreedomPop and Unreal Mobile [Member] |  |  |  |  |
Acquisition of customer relationships |  |  |  |  |
Customer Relationships [Member] |  |  |  |  |
Balances | 27,292 |  | 32,185 |  |
Acquisition of customer relationships | 91 |  | 565 |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (7,197) |  | (5,458) |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (7,197) |  | (5,458) |  |
Balances | 34,271 |  | 27,292 |  | 32,185
Customer Relationships [Member] | Ascio Technologies, Inc. [Member] |  |  |  |  |
Acquisition of customer relationships | 10,610 |  |  |  |
Customer Relationships [Member] | FreedomPop and Unreal Mobile [Member] |  |  |  |  |
Acquisition of customer relationships | 3,475 |  |  |  |
Technology-Based Intangible Assets [Member] |  |  |  |  |
Balances | 163 |  | 2,113 |  |
Acquisition of customer relationships |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (1,087) |  | (1,950) |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (1,087) |  | (1,950) |  |
Balances | 1,516 |  | 163 |  | 2,113
Technology-Based Intangible Assets [Member] | Ascio Technologies, Inc. [Member] |  |  |  |  |
Acquisition of customer relationships | 2,440 |  |  |  |
Network Rights [Member] |  |  |  |  |
Balances | 515 |  | 561 |  |
Acquisition of customer relationships |  |  |  |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (46) |  | (46) |  |
Additions to/(disposals from) domain portfolio, net |  |  |  |  |
Amortization expense | (46) |  | (46) |  |
Balances | 469 |  | 515 |  | 561
Network Rights [Member] | Ascio Technologies, Inc. [Member] |  |  |  |  |
Acquisition of customer relationships |  |  |  |  |
Network Rights [Member] | FreedomPop and Unreal Mobile [Member] |  |  |  |  |
Acquisition of customer relationships |  |  |  |  |
Technology [Member] | FreedomPop and Unreal Mobile [Member] |  |  |  |  |
Acquisition of customer relationships |  |  |  |  |
Surname Domain Names [Member] |  |  |  |  |
Balances | 11,176 |  | 11,257 |  |
Acquisition of customer relationships |  |  |  |  |
Additions to/(disposals from) domain portfolio, net | (12) |  | (81) |  |
Amortization expense |  |  |  |  |
Additions to/(disposals from) domain portfolio, net | (12) |  | (81) |  |
Amortization expense |  |  |  |  |
Balances | 11,164 |  | 11,176 |  | 11,257
Surname Domain Names [Member] | Ascio Technologies, Inc. [Member] |  |  |  |  |
Acquisition of customer relationships |  |  |  |  |
Surname Domain Names [Member] | FreedomPop and Unreal Mobile [Member] |  |  |  |  |
Acquisition of customer relationships |  |  |  |  |
Direct Navigation Domain Names [Member] |  |  |  |  |
Balances | 1,245 |  | 1,505 |  |
Acquisition of customer relationships |  |  |  |  |
Additions to/(disposals from) domain portfolio, net | (102) |  | (260) |  |
Amortization expense |  |  |  |  |
Additions to/(disposals from) domain portfolio, net | (102) |  | (260) |  |
Amortization expense |  |  |  |  |
Balances | 1,143 |  | $ 1,245 |  | $ 1,505
Direct Navigation Domain Names [Member] | Ascio Technologies, Inc. [Member] |  |  |  |  |
Acquisition of customer relationships |  |  |  |  |
Direct Navigation Domain Names [Member] | FreedomPop and Unreal Mobile [Member] |  |  |  |  |
Acquisition of customer relationships |  |  |  |  |
[1] | The Company has initially applied ASC 2016-02 (Topic 842) on January 1, 2019 using the modified retrospective method (note 2(v)). Under this method, the comparative information is not restated.
[2] | The Company has initially applied ASC 2014-09 (Topic 606) on January 1, 2018 and ASC 2016-02 (Topic 842) on January 1, 2019. Both accounting standards were adopted using the modified retrospective method, under this method the comparative periods were not restated.

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