CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - 6 months ended Jun. 30, 2018 - USD ($) $ in Thousands		Total	Ordinary Shares	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Balance at Dec. 31, 2017		$ 113,564		$ 697,165	$ (1,343)	$ (582,258)
Balance (in shares) at Dec. 31, 2017			89,478,032
Proceeds from issuance of shares		938		938
Proceeds from issuance of shares (in shares)			54,386
Share-based compensation to employees		18,726		18,726
Exercise of options and warrants and vested RSUs		12,855		12,855
Exercise of options and warrants and vested RSUs (in shares)			2,970,855
Cumulative effect adjustment on retained earnings	[1]	2,162				2,162
Other comprehensive income, net of tax benefit of $8		70			70
Net loss		(36,234)				(36,234)
Balance at Jun. 30, 2018		$ 112,081		$ 729,684	$ (1,273)	$ (616,330)
Balance (in shares) at Jun. 30, 2018			92,503,273

[1] Resulting from the adoption of ASC 606.