CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY (CAPITAL DEFICIENCY) (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock		Additional paid-in Capital	Accumulated deficit
Beginning Balance at Dec. 31, 2008	$ 44,347	$ 76		$ 119,281	$ (75,010)
Beginning Balance (in shares) at Dec. 31, 2008		75,938,059
Changes during the year
Share-based compensation	2,683			2,683
Exercise of options granted to employees and non-employees (includes net exercise) (in shares)		4,903,178
Exercise of options granted to employees and non-employees (includes net exercise)	293	5		288
Net Loss	(31,440)				(31,440)
Ending Balance at Dec. 31, 2009	15,883	81		122,252	(106,450)
Ending Balance (in shares) at Dec. 31, 2009		80,841,237
Changes during the year
Share-based compensation	1,282			1,282
Exercise of options granted to employees and non-employees (includes net exercise) (in shares)		407,235
Exercise of options granted to employees and non-employees (includes net exercise)	510	0	[1]	510
Net Loss	(28,998)				(28,998)
Ending Balance at Dec. 31, 2010	(11,323)	81		124,044	(135,448)
Ending Balance (in shares) at Dec. 31, 2010		81,248,472
Changes during the year
Common stock issued for cash (net of issuance costs of $1,410) (see note 7c) (in shares)		4,000,000
Common stock issued for cash (net of issuance costs of $1,410) (see note 7c)	20,590	4		20,586
Share-based compensation	886			886
Exercise of options granted to employees and non-employees (includes net exercise) (in shares)		381,685
Exercise of options granted to employees and non-employees (includes net exercise)	299	1		298
Net Loss	(36,529)				(36,529)
Ending Balance at Dec. 31, 2011	$ (26,077)	$ 86		$ 145,814	$ (171,977)
Ending Balance (in shares) at Dec. 31, 2011		85,630,157

[1] Represents an amount less than $1.