CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN CAPITAL DEFICIENCY (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Beginning Balance	$ (26,946)		$ (3,357)
Share-based compensation related to stock options	162		347
Share-based compensation related to restricted stock award, net of forfeitures	508		1,020
Exercise of options granted to employees	43		28
Net loss for the period	(7,345)		(4,321)
Ending Balance	(33,578)		(6,283)
Common Stock [Member]
Beginning Balance	94		93
Beginning Balance (in shares)	93,551,098		93,489,809
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 (in shares)
Exercise of options granted to employees		[1]	1
Exercise of options granted to employees (in shares)	55,362		12,421
Net loss for the period
Ending Balance	94		94
Ending Balance (in shares)	93,606,460		93,502,230
Additional paid-in Capital [Member]
Beginning Balance	184,345		180,145
Share-based compensation related to stock options	162		347
Share-based compensation related to restricted stock award, net of forfeitures	508		1,020
Exercise of options granted to employees	43		27
Net loss for the period
Ending Balance	185,058		181,539
Accumulated Deficit [Member]
Beginning Balance	(211,385)		(183,595)
Share-based compensation related to stock options
Share-based compensation related to restricted stock award, net of forfeitures
Exercise of options granted to employees
Net loss for the period	(7,345)		(4,321)
Ending Balance	$ (218,730)		$ (187,916)

[1] Represents an amount less than $1.