Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues	$ 17,042	$ 13,523	$ 47,822	$ 31,287
Online Advertising Placement [Member]
Revenues	2,346	1,987	6,897	5,920
Sales of Effective Sales Lead Information [Member]
Revenues	161	245	444	1,058
Search Engine Marketing and Data Service [Member]
Revenues	14,532	11,266	40,380	24,253
TV Advertising Service [Member]
Revenues			91
Product and Service, Other [Member]
Revenues	3	25	10	56
Transferred over Time [Member]
Revenues	16,881	13,278	47,378	30,229
Transferred at Point in Time [Member]
Revenues	$ 161	$ 245	$ 444	$ 1,058