Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues	$ 8,567	$ 8,260
Search Engine Marketing and Data Service [Member]
Revenues	6,725	6,443
Online Advertising Placement [Member]
Revenues	1,831	1,597
Sales of Effective Sales Lead Information [Member]
Revenues	6	122
TV Advertising Service [Member]
Revenues		91
Product and Service, Other [Member]
Revenues	5	7
Transferred over Time [Member]
Revenues	8,561	8,138
Transferred at Point in Time [Member]
Revenues	$ 6	$ 122