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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 14,139 $ 16,412
Prepaid expenses and other current assets 2,056 1,599
Current assets of discontinued operations 835 861
Total current assets 17,030 18,872
Property, plant and equipment (net) 184 129
Long-term assets of discontinued operations 272 353
Total assets 17,486 19,354
Current liabilities:    
Accounts payable 2,825 2,259
Accrued and other current liabilities 3,534 5,601
Economic Rights measured at fair value 550 1,120
Other liabilities measured at fair value 20 20
Current liabilities of discontinued operations 323 335
Total current liabilities 7,252 9,335
Total liabilities 7,252 9,335
Commitments and contingencies (Note 8)      
Stockholders' equity:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2012 and March 31, 2013; 1,213,142 and 420,682 shares issued and outstanding at December 31, 2012 and March 31, 2013, respectively. Aggregate preference in liquidation of $14,436,390 and $5,006,116 at December 31, 2012 and March 31, 2013, respectively   1
Common stock, $0.001 par value; 100,000,000 shares authorized at December 31, 2012 and March 31, 2013; 8,686,484 and 10,881,780 shares issued and outstanding at December 31, 2012 and March 31, 2013, respectively 11 9
Additional paid-in capital 292,114 280,211
Accumulated other comprehensive income (loss) (193) 48
Deficit accumulated during the development stage (281,698) (270,250)
Total stockholders' equity 10,234 10,019
Total liabilities and stockholders' equity $ 17,486 $ 19,354