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SIGNIFICANT ACCOUNTING POLICIES (Condensed consolidated statements of cash flows) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net loss	$ (8,462)	$ 450	$ (15,701)	$ (58,698)
Increase (decrease) in contracts liability			41	1,088
Net cash used in operating activities			(17,377)	$ (17,045)
Previously Reported [Member]
Cash flows from operating activities:
Net loss	(11,294)		(20,694)
Increase (decrease) in contracts liability			5,034
Net cash used in operating activities			(17,377)
Restatement Adjustment [Member]
Cash flows from operating activities:
Net loss	$ 2,832		4,993
Increase (decrease) in contracts liability			(4,993)
Net cash used in operating activities			$ 0

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