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) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
General And Administrative Expenses      
Professional services $ 1,199 $ 1,132 $ 1,022
Investors and public relations 400 338 511
Salary and related expenses 665 611 413
Directors' fee 173 198 212
Rent 34 34 32
Travel 170 112 196
Insurance 282 214 142
Stock exchange fees 58 62 57
Office and computer maintenance 82 81 68
Vehicle maintenance 16 14 14
Depreciation 11 16 14
Others 69 56 52
General and administrative expenses $ 3,159 $ 2,868 $ 2,733