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Commitments and Contingent Liabilities (Details Textual) ₪ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 USD ($) | Dec. 31, 2017 ILS (₪) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Commitments and Contingent Liabilities (Textual) |  |  |  |
Royalty commitments, Description | The Company is required to pay royalties at the rate of 3.5% of sales of products developed with funds provided by the OCS, up to an amount equal to 100% of the research and development grants (dollar-linked) received from the OCS. | The Company is required to pay royalties at the rate of 3.5% of sales of products developed with funds provided by the OCS, up to an amount equal to 100% of the research and development grants (dollar-linked) received from the OCS. |  |
Lease expenses | $ 642 |  | $ 643 | $ 365
Outstanding contingent obligation to pay royalties | 3,763 |  |  |
Litigation settlement amount | 750 | ₪ 2,600 |  |
Pre-paid last instalments | 578 |  | $ 436 |
Motor vehicles [Member] |  |  |  |
Commitments and Contingent Liabilities (Textual) |  |  |  |
Pre-paid last instalments | $ 84 |  |  |

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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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