LOSS PER ORDINARY SHARE - Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Diluted
Loss (U.S. dollars in thousands)	$ 45,544	$ 29,370	$ 21,090
Adjustment for financial income of warrants		1,208	346
Loss used to determine diluted loss per share	$ 45,544	$ 30,578	$ 21,436
Weighted average number of ordinary shares outstanding during the period (in thousands)	176,579	128,514	110,814
Adjustment for warrants		295	901
Weighted average number of ordinary shares for diluted loss per share (in thousands)	176,579	128,809	111,715
Diluted loss per share (U.S. dollars)	$ 0.26	$ 0.24	$ 0.19

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The number of dilutive potential ordinary shares that relate to the assumed conversion of the entity's convertible instruments.

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The profit (loss) attributable to ordinary equity holders of the parent equity. [Refer: Profit (loss)]

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The profit (loss) attributable to ordinary equity holders of the parent equity, adjusted for the effects of all dilutive potential ordinary shares. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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