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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net revenue
Licensing and other	$ 249	$ 221
Royalty	1,086	1,203
Total net revenue	1,335	1,424
Cost of net revenue
Licensing and other	19	57
Total cost of net revenue	19	57
Gross profit	1,316	1,367
Operating expenses
Research and development	5,320	7,506
Selling, general and administrative	1,623	2,926
Gain on sale of assets	(630)	(1,856)
Total operating expenses	6,313	8,576
Loss from operations	(4,997)	(7,209)
Other income and expense, net	20	24
Loss before income taxes	(4,977)	(7,185)
Income tax provision	20	30
Net loss	(4,997)	(7,215)
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on available-for-sale securities	4	(13)
Comprehensive loss	$ (4,993)	$ (7,228)
Net loss per share
Basic and diluted (in dollars per share)	$ (0.12)	$ (0.19)
Shares used in computing net loss per share
Basic and diluted (in shares)	40,264	38,566

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The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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