Note 10 - Revenue - Cost of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Network, other costs	$ 2,416	$ 2,395
Cost of revenue	58,835	56,302
Network Expenses [Member]
Network, other costs	2,416	2,395
Network, depreciation and amortization costs	3,231	1,975
Cost of revenue	5,647	4,370
Network Access Services [Member]
Cost of revenue	11,573	11,812
Network, other costs	538	521
Cost of revenue	14,552	13,798
Network Access Services [Member] | Mobile Services [Member]
Cost of revenue	9,857	10,743
Network Access Services [Member] | Other Services [Member]
Cost of revenue	1,716	1,069
Domain Name Services [Member]
Cost of revenue	41,615	40,120
Network, other costs	1,878	1,874
Cost of revenue	44,283	42,504
Domain Name Services [Member] | Wholesale [Member]
Cost of revenue	37,254	35,633
Domain Name Services [Member] | Retail Services [Member]
Cost of revenue	4,234	4,359
Domain Name Services [Member] | Portfolio [Member]
Cost of revenue	127	128
Domain Name Services [Member] | Domain Services [Member] | Wholesale [Member]
Cost of revenue	36,469	34,839
Domain Name Services [Member] | Value Added Services [Member] | Wholesale [Member]
Cost of revenue	$ 785	$ 794