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Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Current assets    
Cash and cash equivalents $ 25,777 $ 45,621
Investments - Certificates of deposit 4,980 1,492
Prepaid expenses and other current assets 1,231 1,784
Total current assets 31,988 48,897
Property, plant and equipment    
Land 154 0
Furniture and fixtures 2,251 669
Computers and equipment 1,212 549
Leasehold improvements 1,148 940
Property, plant and equipment, gross 4,765 2,158
Less: accumulated depreciation (1,512) (477)
Property, plant and equipment, net 3,253 1,681
Total assets 35,241 50,578
Current liabilities    
Accounts payable 925 610
Accrued expenses 5,473 2,582
Warrant liability 2,439 18,005
Total current liabilities 8,837 21,197
Deferred revenue 300 300
Commitments and contingencies (Note 5)      
Stockholders' equity    
Preferred stock, $.01 par value; 10,000,000 shares authorized; no shares issued and outstanding at December 31, 2011 and 2010 0 0
Common stock, $.01 par value; 70,000,000 shares authorized; 48,237,630 and 43,028,146 shares issued and 48,016,002 and 42,932,460 outstanding at December 31, 2011 and December 31, 2010, respectively 482 430
Additional paid-in capital 172,613 144,783
Deficit accumulated during the development stage (146,940) (116,055)
Treasury stock, at cost; 28,100 shares at December 31, 2011 and December 31, 2010 (51) (51)
Accumulated other comprehensive loss 0 (26)
Total stockholders' equity 26,104 29,081
Total liabilities and stockholders' equity $ 35,241 $ 50,578