Discontinued Operations (Details) - HKD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|---|
| Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | |||
| Cash and cash equivalents | $ 0 | $ 0 | $ 163,696 |
| Trade receivables, net | 303,681 | ||
| Inventories | 105,221 | ||
| Deposits, prepayment and other receivables | 42,345 | ||
| Tax prepayment | 3,431 | ||
| Current assets of discontinued operations | 618,374 | ||
| Property, plant and equipment, net | 190,776 | ||
| Deferred tax assets | 13,260 | ||
| Non-current assets of discontinued operations | 204,036 | ||
| Total assets of discontinued operations | 822,410 | ||
| Bank borrowings | 29,223 | ||
| Trade payables | 111,659 | ||
| Other payables and accruals | 141,606 | ||
| Tax payable | 65,107 | ||
| Current liabilities of disposal liabilities | 347,595 | ||
| Total liabilities of disposal liabilities | $ 347,595 |