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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, 2020	Dec. 31, 2019	Dec. 31, 2018
Balances	$ 57,654	$ 49,395
Acquisition		91
Additions to/(disposals from) domain portfolio, net	(17)	(114)	$ (341)	[1]
Amortization expense	(11,420)	(10,333)	(9,243)	[1]
Impairment of definite life intangible asset	(1,431)	0	0	[1]
Other	(223)
Write-down of Ting Mobile customer relationships	(2,581)
Acquisition of Network rights	72
Balances	47,444	57,654	49,395
Ascio Technologies, Inc. [Member]
Acquisition		15,140
FreedomPop and Unreal Mobile [Member]
Acquisition		3,475
Cedar Holdings Group, Incorporated [Member]
Acquisition	5,390
Brand [Member]
Balances	9,091	9,004
Amortization expense	(2,070)	(2,003)
Balances	7,021	9,091	9,004
Brand [Member] | Ascio Technologies, Inc. [Member]
Acquisition		2,090
Customer Relationships [Member]
Balances	34,269	27,290
Acquisition		91
Amortization expense	(8,010)	(7,197)
Impairment of definite life intangible asset	(1,431)
Other	(223)
Write-down of Ting Mobile customer relationships	(2,581)
Balances	26,664	34,269	27,290
Customer Relationships [Member] | Ascio Technologies, Inc. [Member]
Acquisition		10,610
Customer Relationships [Member] | FreedomPop and Unreal Mobile [Member]
Acquisition		3,475
Customer Relationships [Member] | Cedar Holdings Group, Incorporated [Member]
Acquisition	4,640
Technology-Based Intangible Assets [Member]
Balances	1,516	163
Amortization expense	(1,242)	(1,087)
Other
Balances	274	1,516	163
Technology-Based Intangible Assets [Member] | Ascio Technologies, Inc. [Member]
Acquisition		2,440
Network Rights [Member]
Balances	469	515
Amortization expense	(98)	(46)
Other
Acquisition of Network rights	72
Balances	1,193	469	515
Network Rights [Member] | Cedar Holdings Group, Incorporated [Member]
Acquisition	750
Surname Domain Names [Member]
Balances	11,164	11,176
Additions to/(disposals from) domain portfolio, net	(7)	(12)
Balances	11,157	11,164	11,176
Direct Navigation Domain Names [Member]
Balances	1,145	1,247
Additions to/(disposals from) domain portfolio, net	(10)	(102)
Balances	$ 1,135	$ 1,145	$ 1,247
[1] The Company has initially applied ASC 2016-02 (Topic 842) on January 1, 2019 (note 2(u)). The accounting standard was adopted using the modified retrospective method, under this method the comparative period was not restated.

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