Note 4 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenues	$ 15,439	$ 30,585
Transferred over Time [Member]
Revenues	9,909	30,585
Transferred at Point in Time [Member]
Revenues	5,530	0
Search Engine Marketing and Data Service [Member]
Revenues	9,909	30,510
Online Advertising Placement [Member]
Revenues	4,780	0
Blockchain-based SaaS services [Member]
Revenues	$ 750	$ 75