SIGNIFICANT ACCOUNTING POLICIES (Net (loss) earnings per share) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net loss (income) for the period	$ (11,294)	$ 450	$ (20,694)	$ (58,698)
Financial income, net of convertible notes	0	(11,847)	0	0
Loss used for the computation of diluted loss per share	$ (11,294)	$ (11,397)	$ (20,694)	$ (58,698)
Weighted average shares of common stock outstanding for basic calculation	146,644,450	127,523,706	145,985,445	126,000,782
Weighted average dilutive effect of shares issuable upon conversion of convertible notes	0	65,066,683	0	0
Weighted average dilutive effect of stock options	0	8,000	0	0
Weighted average shares of common stock outstanding for diluted calculation	146,644,450	192,598,389	145,985,445	126,000,782

Amount of antidilutive securities excluded from computation of earning per share, diluted .

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Income Loss used for computation of diluted loss per share.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible debt securities using the if-converted method.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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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 sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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