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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 19,656 $ 23,122
Marketable securities available-for-sale 110,916 166,254
Accounts receivable 727 1,627
Prepaid expenses and other current assets 3,578 1,375
Total current assets 134,877 192,378
Property and equipment, net 8,129 8,706
Goodwill 2,376 2,579
Restricted cash 642 662
Other assets 872 297
Total assets 146,896 204,622
Current liabilities:    
Accounts payable 4,972 1,901
Accrued research and development 6,801 2,402
Other accrued liabilities 5,403 5,764
Deferred revenues 5,644 6,125
Total current liabilities 22,820 16,192
Deferred revenues, net of current portion 855 1,173
Other long-term liabilities 1,645 963
Total liabilities 25,320 18,328
Commitments and contingencies      
Stockholders’ equity:    
Preferred stock      
Common stock: $0.001 par value Authorized: 350,000 shares Issued and outstanding: 262,934 shares at September 30, 2014 and 262,796 shares at December 31, 2013 263 263
Additional paid-in capital 693,066 688,390
Accumulated other comprehensive loss (1,106) (148)
Accumulated deficit (570,647) (502,211)
Total stockholders’ equity 121,576 186,294
Total liabilities and stockholders’ equity 146,896 204,622
Series B Convertible Preferred Stock
    
Stockholders’ equity:    
Preferred stock