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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 19,964 $ 24,449
Inventory 50 182
Prepaid expenses and other current assets 1,639 1,200
Total current assets 21,653 25,831
Property, plant and equipment (net) 149 167
Total assets 21,802 25,998
Current liabilities:    
Accounts payable 1,544 1,763
Accrued liabilities and other current liabilities 4,174 4,664
Economic rights 1,007  
Other liabilities measured at fair value 21 71
Total current liabilities 6,746 6,498
Total liabilities 6,746 6,498
Stockholders' equity:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2011 and June 30, 2012; 1,213,142 shares issued and outstanding at December 31, 2011 and June 30, 2012. Aggregate preference in liquidation of $13,708,505 and $14,072,447 at December 31, 2011 and June 30, 2012, respectively 1 1
Common stock, $0.001 par value; 100,000,000 shares authorized at December 31, 2011 and June 30, 2012; 54,220,458 and 59,001,229 shares issued and outstanding at December 31, 2011 and June 30, 2012, respectively 59 54
Additional paid-in capital 278,514 276,452
Accumulated other comprehensive loss 78 57
Deficit accumulated during the development stage (263,596) (257,064)
Total stockholders' equity 15,056 19,500
Total liabilities and stockholders' equity $ 21,802 $ 25,998