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CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 31,146 $ 16,412
Prepaid expenses and other current assets 3,388 1,599
Current assets of discontinued operations 639 861
Total current assets 35,173 18,872
Property, plant and equipment (net) 275 129
Long-term assets of discontinued operations 72 353
Total assets 35,520 19,354
Current liabilities:    
Accounts payable 2,545 2,259
Accrued and other current liabilities 4,672 5,601
Economic Rights measured at fair value   1,120
Other liabilities measured at fair value 20 20
Current liabilities of discontinued operations 260 335
Total current liabilities 7,497 9,335
Total liabilities 7,497 9,335
Commitments and contingencies      
Stockholders' equity:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2012 and 2013; 1,213,142 and 335,273 shares issued and outstanding at December 31, 2012 and 2013. Aggregate preference in liquidation of $14,436,390 and $3,989,749 at December 31, 2012 and 2013, respectively.   1
Common stock, $0.001 par value; 100,000,000 shares authorized at December 31, 2012 and 2013; 8,686,484 and 19,369,332 shares issued and outstanding at December 31, 2012 and 2013, respectively. 19 9
Additional paid-in capital 317,543 280,211
Accumulated other comprehensive income (loss) (109) 48
Deficit accumulated during the development stage (289,430) (270,250)
Total stockholders' equity 28,023 10,019
Total liabilities and stockholders' equity $ 35,520 $ 19,354