CONSOLIDATED UNAUDITED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Research and development expenses, net	$ 2,570	$ 1,737	$ 4,909	$ 3,357
General and administrative expenses	924	950	1,749	1,435
Operating loss	3,494	2,687	6,658	4,792
Finance income, net	139	30	153	9
Loss before income tax	3,355	2,657	6,505	4,783
Taxes on income		(2)		(1)
Net loss	3,355	2,655	6,505	4,782
Other comprehensive loss:
Change in fair value of cash flow hedge	(4)		13
Comprehensive loss	$ 3,351	$ 2,655	$ 6,518	$ 4,782
Net loss per ordinary share - basic and diluted	$ 0.41	$ 0.7	$ 0.85	$ 1.74
Weighted average number of ordinary shares outstanding - basic and diluted	8,238	3,796	7,663	2,741

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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