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Taxes on Income - Schedule of Deferred Income Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
In respect of: |  |  |  |
Net operating loss carry forward | $ 5,844 | $ 3,280 | $ 3,691 |
Deferred Rent | 46 |  |  |
Research and Development expenses | 2,887 |  | 742 |
Stock-based compensation | 897 |  |  |
Issuance Costs | 1,261 |  |  |
In-Process R&D | 761 | 806 |  |
Accrued expenses | 5 |  |  |
Other | 24 | 72 | 66 |
Less—valuation allowance | (11,725) | (4,158) | (4,499) | $ (2,551)
Net deferred tax assets |  |  |  |

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