Note 10 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	[1]	Dec. 31, 2017
Net Revenues	$ 85,946	$ 88,129	$ 84,117	$ 78,953	$ 85,612	$ 83,519	$ 81,087	$ 95,795	$ 337,145	$ 346,013	[2]	$ 329,421
Network Access Services [Member]
Net Revenues									95,663	97,324		89,452
Domain Name Services [Member]
Net Revenues									241,482	248,689		239,969
Domain Name Services [Member] | Wholesale [Member]
Net Revenues									201,879	207,190		201,563
Domain Name Services [Member] | Retail Services [Member]
Net Revenues									34,786	34,524		31,649
Domain Name Services [Member] | Portfolio [Member]
Net Revenues									4,817	6,975		6,757
Mobile Services [Member] | Network Access Services [Member]
Net Revenues									84,657	89,340		83,885
Other Services [Member] | Network Access Services [Member]
Net Revenues									11,006	7,984		5,567
Domain Services [Member] | Domain Name Services [Member] | Wholesale [Member]
Net Revenues									182,957	189,434		183,731
Value Added Services [Member] | Domain Name Services [Member] | Wholesale [Member]
Net Revenues									$ 18,922	$ 17,756		$ 17,832

[1] As a result of the bulk transfers of 2.89 million domain names to Namecheap throughout 2018, recognized revenue for the year ended December 31, 2018 includes $16.9 million, related to previously deferred revenue, a portion of which would have otherwise been recognized after December 31, 2018.

[2] 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.