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Cash and Cash Equivalents (Tables) | 12 Months Ended
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Dec. 31, 2018
Cash and Cash Equivalents [Abstract] |
Schedule of Cash and Cash Equivalents |
|  | December 31 |
|  | 2017 |  |  | 2018 |
|  | US$ thousands |
Cash |  |  | 12,834 |  |  |  | 16,147 |
Cash equivalents * |  |  | 4,187 |  |  |  | 10,661 |
|  |  | 17,021 |  |  |  | 26,808 |
* | Comprised mainly of deposits in banks as at December 31, 2017 and 2018 carrying a weighted average interest rate of 0.07% and 2.79%, respectively.

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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