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v3.19.1

Segment information (Details 1) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenue | $ 20,104 | $ 17,350 | $ 22,478
Geographical analysis of long-lived assets | 754 | 734 |
The PRC |  |  |
Revenue | 8,026 | 7,740 | 10,604
Geographical analysis of long-lived assets | 250 | 274 |
Hong Kong |  |  |
Revenue | 11,169 | 9,270 | 11,687
Geographical analysis of long-lived assets | 504 | 460 |
Others |  |  |
Revenue | $ 909 | $ 340 | $ 187

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