CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL DEFICIENCY - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Balance				$ (55,601)	$ (26,946)
Share-based compensation related to stock options				947	161
Share-based compensation related to restricted stock award, net of forfeitures				472	522
Exercise of options granted to employees (includes net exercise)				534	43
Net loss for the period		$ (3,820)	$ (8,010)	(14,863)	(21,474)
Balance		(68,511)	(47,694)	(68,511)	(47,694)
Common Stock [Member]
Balance				$ 94	$ 94
Balance, shares				93,603,819	93,551,098
Share-based compensation related to stock options
Share-based compensation related to restricted stock award, net of forfeitures
Share-based compensation related to restricted stock award, net of forfeitures, shares				(2,501)	(1,834)
Exercise of options granted to employees (includes net exercise)	[1]
Exercise of options granted to employees (includes net exercise), shares				550,000	113,800
Net loss for the period
Balance		$ 94	$ 94	$ 94	$ 94
Balance, shares		94,151,318	93,663,064	94,151,318	93,663,064
Additional Paid-in Capital [Member]
Balance				$ 185,633	$ 184,345
Share-based compensation related to stock options				947	161
Share-based compensation related to restricted stock award, net of forfeitures				472	522
Exercise of options granted to employees (includes net exercise)				$ 534	$ 43
Net loss for the period
Balance		$ 187,586	$ 185,071	$ 187,586	$ 185,071
Accumulated Deficit [Member]
Balance				$ (241,328)	$ (211,385)
Share-based compensation related to stock options
Share-based compensation related to restricted stock award, net of forfeitures
Exercise of options granted to employees (includes net exercise)
Net loss for the period				$ (14,863)	$ (21,474)
Balance		$ (256,191)	$ (232,859)	$ (256,191)	$ (232,859)

[1] Represents amount less than thousand