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Note 10 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2018	Jun. 30, 2017
Net Revenues	$ 81,087	$ 84,223	[1]	$ 176,882	$ 153,791	[1]
Network Access Services [Member]
Net Revenues	24,306	21,627		47,914	40,876
Domain Name Services [Member]
Net Revenues	56,781	62,596		128,968	112,915
Domain Name Services [Member] | Wholesale [Member]
Net Revenues	47,141	53,965		110,003	96,966
Domain Name Services [Member] | Retail Services [Member]
Net Revenues	8,477	7,663		16,913	14,064
Domain Name Services [Member] | Portfolio [Member]
Net Revenues	1,163	968		2,052	1,885
Mobile Services [Member] | Network Access Services [Member]
Net Revenues	22,411	20,379		44,283	38,341
Other Services [Member] | Network Access Services [Member]
Net Revenues	1,895	1,248		3,631	2,535
Domain Services [Member] | Domain Name Services [Member] | Wholesale [Member]
Net Revenues	42,540	48,550		100,968	87,644
Value Added Services [Member] | Domain Name Services [Member] | Wholesale [Member]
Net Revenues	$ 4,601	$ 5,415		$ 9,035	$ 9,322
[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.

X

- Definition

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

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