Note 4 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenues	$ 26,235	$ 47,328
Search Engine Marketing and Data Service [Member]
Revenues	22,262	39,224
Online Advertising Placement [Member]
Revenues	3,548	7,442
Offline Advertising and Marketing Services [Member]
Revenues	0	662
Blockchain-based SaaS services [Member]
Revenues	425	0
Transferred over Time [Member]
Revenues	25,835	47,328
Transferred at Point in Time [Member]
Revenues	$ 400	$ 0