Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues	$ 15,453	$ 22,520	$ 24,020	$ 30,780
Search Engine Marketing and Data Service [Member]
Revenues	11,855	19,405	18,580	25,848
Online Advertising Placement [Member]
Revenues	3,575	2,954	5,406	4,551
Sales of Effective Sales Lead Information [Member]
Revenues	23	161	29	283
TV Advertising Service [Member]
Revenues				91
Product and Service, Other [Member]
Revenues			5	7
Transferred over Time [Member]
Revenues	15,430	22,359	23,991	30,497
Transferred at Point in Time [Member]
Revenues	$ 23	$ 161	$ 29	$ 283