Note 4 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenues	$ 9,181	$ 7,216	$ 25,317	$ 21,813
Search Engine Marketing and Data Service [Member]
Revenues	9,011	6,236	24,815	18,605
Online Advertising Placement [Member]
Revenues	145	980	427	3,208
Blockchain-based SaaS services [Member]
Revenues	25	0	75	0
Transferred over Time [Member]
Revenues	9,156	7,216	25,242	21,813
Transferred at Point in Time [Member]
Revenues	$ 25	$ 0	$ 75	$ 0