CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
REVENUES	$ 8,386	$ 6,642	$ 388
COMPANY'S SHARE IN COLLABORATION AGREEMENT	(5,418)	4,602
COST OF REVENUES	(1,525)	(4,383)	(3,575)
GROSS PROFIT (LOSS)	1,443	6,861	(3,187)
RESEARCH AND DEVELOPMENT EXPENSES	(37,818)	(37,691)	(27,390)
Less - grants and reimbursements	6,775	7,740	5,752
RESEARCH AND DEVELOPMENT EXPENSES, NET	(31,043)	(29,951)	(21,638)
GENERAL AND ADMINISTRATIVE EXPENSES	(6,931)	(6,876)	(7,144)
OPERATING LOSS	(36,531)	(29,966)	(31,969)
FINANCIAL INCOME - NET	2	968	529
NET LOSS FOR THE YEAR	$ (36,529)	$ (28,998)	$ (31,440)
Net loss per share of common stock - basic and diluted:	$ 0.43	$ 0.36	$ 0.41
Weighted average number of shares of common stock used in computing loss per share of common stock, basic and diluted:	84,645,364	80,960,300	76,942,840