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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

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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