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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, 2012
Mar. 31, 2011
Net revenue    
Licensing and other $ 221 $ 1,347
Royalty 1,203 2,192
Total net revenue 1,424 3,539
Cost of net revenue    
Licensing and other 57 690
Total cost of net revenue 57 690
Gross profit 1,367 2,849
Operating expenses    
Research and development 7,506 6,155
Selling, general and administrative 2,926 2,714
Gain on sale of assets (1,856)  
Total operating expenses 8,576 8,869
Loss from operations (7,209) (6,020)
Other income and expense, net 24 9
Loss before income taxes (7,185) (6,011)
Income tax provision 30 18
Net loss (7,215) (6,029)
Other comprehensive loss, net of tax:    
Net unrealized losses on available-for-sale securities (13) (8)
Comprehensive loss $ (7,228) $ (6,037)
Net loss per share    
Basic and diluted (in dollars per share) $ (0.19) $ (0.16)
Shares used in computing net loss per share    
Basic (in shares) 38,566 37,264
Diluted (in shares) 38,566 37,264