Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

General and Administrative Expenses (Details)

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General and Administrative Expenses (Details) - NIS [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement Line Items [Line Items]      
Professional services $ 4,030 $ 3,917 $ 4,408
Investors and public relations 1,227 1,959 1,633
Salary and related expenses 2,163 1,590 1,669
Directors' fee 706 805 773
Rent 123 123 123
Travel 403 753 814
Insurance 761 544 469
Stock exchange fees 231 222 222
Office and computer maintenance 293 260 250
Vehicle maintenance 50 55 49
Depreciation 58 56 45
Others 204 199 178
General and administrative expenses $ 10,249 $ 10,483 $ 10,633