Note 6 - Goodwill and Other Intangible Assets - Acquired Intangible Assets by Major Class (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Balances	$ 59,915		$ 57,654
Cedar Networks acquisition (Note 4 (b))	(185)
Additions to/(disposals from) domain portfolio, net	(2)	$ (2)	(15)	$ (6)
Impairment of definite life intangible asset	(1,431)	0	(1,431)	0
Other	(223)		(223)
Classified as assets held for-sale	(2,581)		(2,581)
Acquisition of Network rights	69		69
Amortization expense	(2,830)	$ (2,565)	(6,131)	$ (4,605)
Balances	52,732		52,732
Cedar Networks acquisition (Note 4 (b))			5,390
Brand [Member]
Balances	8,573		9,091
Cedar Networks acquisition (Note 4 (b))	0
Additions to/(disposals from) domain portfolio, net	0		0
Impairment of definite life intangible asset	0		0
Other	0		0
Classified as assets held for-sale	0		0
Acquisition of Network rights			0
Amortization expense	(517)		(1,035)
Balances	8,056		8,056
Cedar Networks acquisition (Note 4 (b))			0
Customer Relationships [Member]
Balances	36,469		34,268
Cedar Networks acquisition (Note 4 (b))	10
Additions to/(disposals from) domain portfolio, net	0		0
Impairment of definite life intangible asset	(1,431)		(1,431)
Other	(223)		(223)
Classified as assets held for-sale	(2,581)		(2,581)
Acquisition of Network rights			0
Amortization expense	(1,987)		(4,416)
Balances	30,257		30,257
Cedar Networks acquisition (Note 4 (b))			4,640
Technology-Based Intangible Assets [Member]
Balances	1,189		1,516
Cedar Networks acquisition (Note 4 (b))	0
Additions to/(disposals from) domain portfolio, net	0		0
Impairment of definite life intangible asset	0		0
Other	0		0
Classified as assets held for-sale	0		0
Acquisition of Network rights			0
Amortization expense	(305)		(632)
Balances	884		884
Cedar Networks acquisition (Note 4 (b))			0
Network Rights [Member]
Balances	1,387		469
Cedar Networks acquisition (Note 4 (b))	(195)
Additions to/(disposals from) domain portfolio, net	0		0
Impairment of definite life intangible asset	0		0
Other	0		0
Classified as assets held for-sale	0		0
Acquisition of Network rights	69		69
Amortization expense	(21)		(48)
Balances	1,240		1,240
Cedar Networks acquisition (Note 4 (b))			750
Surname Domain Names [Member]
Balances	11,162		11,166
Cedar Networks acquisition (Note 4 (b))	0
Additions to/(disposals from) domain portfolio, net	(2)		(6)
Impairment of definite life intangible asset	0		0
Other	0		0
Classified as assets held for-sale	0		0
Acquisition of Network rights			0
Amortization expense	0		0
Balances	11,160		11,160
Cedar Networks acquisition (Note 4 (b))			0
Direct Navigation Domain Names [Member]
Balances	1,135		1,144
Cedar Networks acquisition (Note 4 (b))	0
Additions to/(disposals from) domain portfolio, net	0		(9)
Impairment of definite life intangible asset	0		0
Other	0		0
Classified as assets held for-sale	0		0
Acquisition of Network rights			0
Amortization expense	0		0
Balances	$ 1,135		1,135
Cedar Networks acquisition (Note 4 (b))			$ 0