CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - 3 months ended Mar. 31, 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
Share-based compensation to employees		8,520		8,520
Exercise of options and warrants		2,581		2,581
Exercise of options and warrants (in shares)			920,869
Cumulative effect adjustment on retained earnings	[1]	2,162				2,162
Other comprehensive income, net of tax benefit of $5		15			15
Net loss		(20,724)				(20,724)
Balance at Mar. 31, 2018		$ 106,118		$ 708,266	$ (1,328)	$ (600,820)
Balance (in shares) at Mar. 31, 2018			90,398,901

[1] Resulting from the adoption of ASC 606.