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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 21,089 $ 5,530
Receivables 9 9
Other current assets 364 636
Total current assets 21,462 6,175
Property and equipment, net 1,246 1,564
Total assets 22,708 7,739
Current liabilities:    
Accounts payable and accrued expenses 3,244 2,963
Accrued employee benefits 742 1,042
Current portion of long-term debt 40 40
Warrant liabilities 2,954 16,625
Total current liabilities 6,980 20,670
Long-term debt 9 40
Total liabilities 6,989 20,710
Total convertible preferred stock 40,358  
Shareholders' deficit:    
Common stock, no par value; shares authorized - 150,000; shares issued and outstanding - 38,635 and 43,784, respectively 242,771 228,877
Deficit accumulated during the development stage (267,410) (241,848)
Total shareholders' deficit (24,639) (12,971)
Total liabilities, convertible preferred stock and shareholders' deficit 22,708 7,739
Series B-1 non-voting convertible preferred stock
    
Current liabilities:    
Total convertible preferred stock 2,668  
Series B-2 voting convertible preferred stock
    
Current liabilities:    
Total convertible preferred stock $ 37,690