Operating Segment and Geographical Information (Details 1) - HKD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Assets | ||
| Current assets | $ 570,002 | $ 622,741 |
| Non-current financial assets | 209,823 | 170,420 |
| Consolidated total assets before intangible asset | 779,825 | 793,161 |
| Intangible asset | 438 | 438 |
| Consolidated total assets | 780,263 | 793,599 |
| Liabilities | ||
| Liabilities excluding tax liabilities | 4,690 | 6,138 |
| Tax liabilities | 6,243 | 5,837 |
| Consolidated total liabilities | $ 10,933 | $ 11,975 |