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Financial Income (Expenses), Net (Tables) | 12 Months Ended
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Dec. 31, 2016
Other Income and Expenses [Abstract] |
Financial Income (Expenses), Net |
|  | Year ended December 31 |
|  | 2014 |  |  | 2015 |  |  | 2016 |
|  | US$ thousands |
Interest income |  |  | 1,266 |  |  |  | 1,026 |  |  |  | 751 |
Discount on marketable securities, net |  |  | (758 | ) |  |  | (561 | ) |  |  | (358 | )
Exchange rate differences, net |  |  | (95 | ) |  |  | (148 | ) |  |  | (236 | )
Bank charges |  |  | (150 | ) |  |  | (97 | ) |  |  | (122 | )
|  |  | 263 |  |  |  | 220 |  |  |  | 35

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