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Net income per ordinary share (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2018
Earnings Per Share [Abstract] |
Basic and diluted number of shares |
|  | 2018 |  |  | 2017 |  |  | 2016 |
|  | Number of shares |
Weighted average number of ordinary shares for the purposes of basic and diluted net income per share |  |  | 2,061,909 |  |  |  | 2,061,909 |  |  |  | 2,061,909 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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