Note 3 - Summary of Significant Accounting Policies - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues	$ 15,508	$ 17,042	$ 39,528	$ 47,822
Search Engine Marketing and Data Service [Member]
Revenues	11,554	14,532	30,134	40,380
Online Advertising Placement [Member]
Revenues	3,725	2,346	9,131	6,897
Sales of Effective Sales Lead Information [Member]
Revenues	224	161	253	444
TV Advertising Service [Member]
Revenues				91
Product and Service, Other [Member]
Revenues	5	3	10	10
Transferred over Time [Member]
Revenues	15,284	16,881	39,275	47,378
Transferred at Point in Time [Member]
Revenues	$ 224	$ 161	$ 253	$ 444