Note 4 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues	$ 548	$ 6,420	$ 2,200	$ 9,951
Search Engine Marketing and Data Service [Member]
Revenues	0	5,670	49	9,201
Online Advertising Placement [Member]
Revenues	469	0	1,439	0
Blockchain-based SaaS services [Member]
Revenues	0	750	615	750
IP Services [Member]
Revenues	79	0	97	0
Transferred over Time [Member]
Revenues	79	5,670	146	9,201
Transferred at Point in Time [Member]
Revenues	$ 469	$ 750	$ 2,054	$ 750