Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues	$ 22,520	$ 10,500	$ 30,780	$ 17,764
Online Advertising Placement [Member]
Revenues	2,954	2,031	4,551	3,933
Sales of Effective Sales Lead Information [Member]
Revenues	161	423	283	813
Search Engine Marketing and Data Service [Member]
Revenues	19,405	8,015	25,848	12,987
TV Advertising Service [Member]
Revenues			91
Product and Service, Other [Member]
Revenues		31	7	31
Transferred over Time [Member]
Revenues	22,359	10,077	30,497	16,951
Transferred at Point in Time [Member]
Revenues	$ 161	$ 423	$ 283	$ 813