Note 11 - Costs to Obtain and Fulfill a Contract (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2018
Capitalized Contract Cost, Net, Total			$ 1,400
Deferred Costs of Acquisition [Member]
Capitalized Contract Cost, Net, Total	$ 362	$ 1,400
Increase (Decrease) in Capitalized Costs	430
Capitalized Contract Cost, Amortization	536
Capitalized Contract Cost, Impairment Loss	$ 932
Deferred Costs of Acquisition [Member] | Minimum [Member]
Capitalized Contract Cost, Amortization Period (Year)	2 years
Deferred Costs of Acquisition [Member] | Maximum [Member]
Capitalized Contract Cost, Amortization Period (Year)	10 years
Domain Registration Costs [Member]
Capitalized Contract Cost, Net, Total	$ 111,066	$ 109,167
Increase (Decrease) in Capitalized Costs	170,200
Capitalized Contract Cost, Amortization	168,300
Capitalized Contract Cost, Impairment Loss	$ 0
Domain Registration Costs [Member] | Minimum [Member]
Capitalized Contract Cost, Amortization Period (Year)	1 year
Domain Registration Costs [Member] | Maximum [Member]
Capitalized Contract Cost, Amortization Period (Year)	10 years