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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 34,487 $ 16,412
Prepaid expenses and other current assets 2,440 1,599
Current assets of discontinued operations 792 861
Total current assets 37,719 18,872
Property, plant and equipment (net) 174 129
Long-term assets of discontinued operations 96 353
Total assets 37,989 19,354
Current liabilities:    
Accounts payable 2,352 2,259
Accrued and other current liabilities 6,284 5,601
Economic Rights measured at fair value   1,120
Other liabilities measured at fair value 20 20
Current liabilities of discontinued operations 322 335
Total current liabilities 8,978 9,335
Total liabilities 8,978 9,335
Commitments and contingencies (Note 7)      
Stockholders' equity:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2012 and September 30, 2013; 1,213,142 and 335,273 shares issued and outstanding at December 31, 2012 and September 30, 2013, respectively. Aggregate preference in liquidation of $14,436,390 and $3,989,749 at December 31, 2012 and September 30, 2013, respectively   1
Common stock, $0.001 par value; 100,000,000 shares authorized at December 31, 2012 and September 30, 2013; 8,686,484 and 18,691,718 shares issued and outstanding at December 31, 2012 and September 30, 2013, respectively 18 9
Additional paid-in capital 315,036 280,211
Accumulated other comprehensive income (loss) (172) 48
Deficit accumulated during the development stage (285,871) (270,250)
Total stockholders' equity 29,011 10,019
Total liabilities and stockholders' equity $ 37,989 $ 19,354