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CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 28,154 $ 31,146
Prepaid expenses and other current assets 4,718 3,388
Current assets of discontinued operations 580 639
Total current assets 33,452 35,173
Property and equipment (net) 285 275
Long-term assets of discontinued operations 48 72
Total assets 33,785 35,520
Current liabilities:    
Accounts payable 4,719 2,545
Accrued and other current liabilities 3,811 4,672
Other liabilities measured at fair value 20 20
Current liabilities of discontinued operations 260 260
Total current liabilities 8,810 7,497
Total liabilities 8,810 7,497
Commitments and contingencies      
Stockholders' equity:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized at December 31, 2013 and March 31, 2014; 335,273 shares issued and outstanding at December 31, 2013 and March 31, 2014. Aggregate preference in liquidation of $3,989,749 at December 31, 2013 and March 31, 2014.      
Common stock, $0.001 par value; 100,000,000 shares authorized at December 31, 2013 and March 31, 2014; 19,369,332 and 19,819,332 shares issued and outstanding at December 31, 2013 and March 31, 2014, respectively. 20 19
Additional paid-in capital 319,355 317,543
Accumulated other comprehensive income (loss) (101) (109)
Deficit accumulated during the development stage (294,299) (289,430)
Total stockholders' equity 24,975 28,023
Total liabilities and stockholders' equity $ 33,785 $ 35,520