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Note 4 - Goodwill and Other Intangible Assets - Acquired Intangible Assets by Major Class (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Gross carrying value $ 106,175 $ 105,607  
Accumulated amortization 81,420 76,123  
Total net book value 24,755 29,484 $ 39,790
Balances 29,484 39,790  
Acquisition of customer relationship 575 528  
Additions to/(disposals from) domain portfolio, net (7) (5)  
Amortization expense (5,297) (10,829) (11,394)
Balances 24,755 29,484 39,790
Surname Domain Names [Member]      
Gross carrying value 11,145 11,151  
Total net book value 11,145 11,151 11,155
Balances 11,151 11,155  
Additions to/(disposals from) domain portfolio, net (6) (4)  
Amortization expense 0 0  
Balances 11,145 11,151 11,155
Direct Navigation Domain Names [Member]      
Gross carrying value 1,127 1,128  
Total net book value 1,127 1,128 1,129
Balances 1,128 1,129  
Additions to/(disposals from) domain portfolio, net (1) (1)  
Amortization expense 0 0  
Balances 1,127 1,128 1,129
Brand [Member]      
Gross carrying value 15,764 15,764  
Accumulated amortization 15,340 14,894  
Total net book value 424 870 2,940
Balances 870 2,940  
Additions to/(disposals from) domain portfolio, net 0 0  
Amortization expense (446) (2,070)  
Balances 424 870 2,940
Customer Relationships [Member]      
Gross carrying value 66,467 65,892  
Accumulated amortization 56,719 52,589  
Total net book value 9,748 13,303 20,813
Balances 13,303 20,813  
Acquisition of customer relationship 575 528  
Additions to/(disposals from) domain portfolio, net 0 0  
Amortization expense (4,130) (8,038)  
Balances 9,748 13,303 20,813
Technology-Based Intangible Assets [Member]      
Gross carrying value 10,157 10,157  
Accumulated amortization 8,631 8,009  
Total net book value 1,526 2,148 2,770
Balances 2,148 2,770  
Additions to/(disposals from) domain portfolio, net 0 0  
Amortization expense (622) (622)  
Balances 1,526 2,148 2,770
Network Rights [Member]      
Gross carrying value 1,515 1,515  
Accumulated amortization 730 631  
Total net book value 785 884 983
Balances 884 983  
Additions to/(disposals from) domain portfolio, net 0 0  
Amortization expense (99) (99)  
Balances $ 785 $ 884 $ 983