Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 38,408	$ 58,080
Search Engine Marketing and Data Service [Member]
Revenues	25,997	41,361
Online Advertising Placement [Member]
Revenues	8,421	14,552
Sales of Effective Sales Lead Information [Member]
Revenues		255
Data and Technical Services [Member]
Revenues	1,200	710
Offline Advertising and Marketing Services [Member]
Revenues	1,545
Technical Solution Services [Member]
Revenues	1,245
Software Sales [Member]
Revenues		1,202
Transferred over Time [Member]
Revenues	37,163	55,913
Transferred at Point in Time [Member]
Revenues	$ 1,245	$ 2,167