Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues	$ 8,396	$ 4,384
Search Engine Marketing and Data Service [Member]
Revenues	6,865	1,988
Online Advertising Placement [Member]
Revenues	1,402	948
Data and Technical Services [Member]
Revenues		300
Offline Advertising and Marketing Services [Member]
Revenues	129	503
Technical Solution Services [Member]
Revenues		645
Transferred over Time [Member]
Revenues	8,396	3,739
Transferred at Point in Time [Member]
Revenues		$ 645