CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
NET LOSS	$ 18,993	$ 18,628	$ 34,197	$ 44,605
OTHER COMPREHENSIVE LOSS (INCOME):
Net unrealized gains from marketable securities	(4)	(25)	(40)	(10)
Losses on marketable securities reclassified into net loss		(1)		(2)
Net unrealized losses (gains) on derivative financial instruments	13	67	(2)	81
losses on derivative financial instruments reclassified into net loss		(41)		(35)
TOTAL OTHER COMPREHENSIVE LOSS (INCOME)	9		(42)	34
TOTAL COMPREHENSIVE LOSS	$ 19,002	$ 18,628	$ 34,155	$ 44,639