Summary of Significant Accounting Policies (Tables)
|12 Months Ended|
Dec. 31, 2017
|Summary of Significant Accounting Policies|
|Schedule of weighted average number of shares||
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).
Reference 1: http://www.xbrl.org/2003/role/presentationRef