Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues	$ 7,652	$ 8,396
Search Engine Marketing and Data Service [Member]
Revenues	6,594	6,865
Online Advertising Placement [Member]
Revenues	1,058	1,402
Offline Advertising and Marketing Services [Member]
Revenues	0	129
Transferred over Time [Member]
Revenues	7,652	8,396
Transferred at Point in Time [Member]
Revenues	$ 0	$ 0