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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net revenue
Licensing	$ 756	$ 1,494	$ 3,319	$ 5,060
Royalty	1,351	2,282	5,619	6,535
Total net revenue	2,107	3,776	8,938	11,595
Cost of net revenue
Licensing	356	735	1,515	2,058
Total cost of net revenue	356	735	1,515	2,058
Gross profit	1,751	3,041	7,423	9,537
Operating expenses
Research and development	6,648	6,779	19,369	19,456
Selling, general and administrative	1,952	2,435	6,583	7,541
Total operating expenses	8,600	9,214	25,952	26,997
Loss from operations	(6,849)	(6,173)	(18,529)	(17,460)
Other income and expense, net	10	8	44	200
Loss before income taxes	(6,839)	(6,165)	(18,485)	(17,260)
Income tax provision	24	33	59	91
Net loss	$ (6,863)	$ (6,198)	$ (18,544)	$ (17,351)
Net loss per share
Basic and diluted (in dollars per share)	$ (0.18)	$ (0.19)	$ (0.49)	$ (0.55)
Shares used in computing net loss per share
Basic (in shares)	38,090	31,946	37,700	31,616
Diluted (in shares)	38,090	31,946	37,700	31,616

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