CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL DEFICIENCY - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Balance				$ (55,601)	$ (26,946)
Share-based compensation related to stock options				595	190
Share-based compensation related to restricted stock award, net of forfeitures				378	387
Exercise of options granted to employees (includes net exercise)				534	43
Net loss for the period		$ (5,071)	$ (6,119)	(11,043)	(13,464)
Balance		(65,137)	(39,790)	(65,137)	(39,790)
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)
Exercise of options granted to employees (includes net exercise)	[1]
Exercise of options granted to employees (includes net exercise), shares				550,000	55,362
Net loss for the period
Balance		$ 94	$ 94	$ 94	$ 94
Balance, shares		94,151,318	93,606,460	94,151,318	93,606,460
Additional Paid-in Capital [Member]
Balance				$ 185,633	$ 184,345
Share-based compensation related to stock options				595	190
Share-based compensation related to restricted stock award, net of forfeitures				378	387
Exercise of options granted to employees (includes net exercise)				$ 534	$ 43
Net loss for the period
Balance		$ 187,140	$ 184,965	$ 187,140	$ 184,965
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				$ (11,043)	$ (13,464)
Balance		$ (252,371)	$ (224,849)	$ (252,371)	$ (224,849)

[1] Represents amount less than thousand