Note 4 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Revenues	$ 1,717	$ 3,239	$ 3,917	$ 13,190
Search Engine Marketing and Data Service [Member]
Revenues	1	3,239	50	12,440
Online Advertising Placement [Member]
Revenues	1,634	0	3,073	0
Blockchain-based SaaS services [Member]
Revenues	0	0	615	750
IP Services [Member]
Revenues	82		179
Transferred over Time [Member]
Revenues	83	3,239	229	12,440
Transferred at Point in Time [Member]
Revenues	$ 1,634	$ 0	$ 3,688	$ 750