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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Current assets    
Cash and cash equivalents $ 17,050 $ 25,777
Investments - Certificates of deposit 3,735 4,980
Prepaid expenses and other current assets 1,345 1,231
Total current assets 22,130 31,988
Property, plant and equipment    
Land 154 154
Furniture, fixtures and equipment 904 880
Machinery and equipment 1,424 1,371
Computers and equipment 1,469 1,212
Leasehold improvements 1,386 1,148
Property, plant and equipment, gross 5,337 4,765
Less: accumulated depreciation (1,834) (1,512)
Property, plant and equipment, net 3,503 3,253
Total assets 25,633 35,241
Current liabilities    
Accounts payable 1,802 925
Accrued expenses 3,824 5,473
Warrant liability 2,930 2,439
Total current liabilities 8,556 8,837
Deferred revenue 300 300
Commitments and contingencies      
Stockholders' equity    
Preferred stock, $.01 par value; 10,000,000 shares authorized; no shares issued and outstanding at March 31, 2012 and December 31, 2011 0 0
Common stock, $.01 par value; 70,000,000 shares authorized; 49,788,761 and 48,237,630 shares issued and 49,760,661 and 48,209,534 outstanding at March 31, 2012 and December 31, 2011, respectively 498 482
Additional paid-in capital 178,159 172,613
Deficit accumulated during the development stage (161,829) (146,940)
Treasury stock, at cost; 28,100 shares at March 31, 2012 and December 31, 2011 (51) (51)
Total stockholders' equity 16,777 26,104
Total liabilities and stockholders' equity $ 25,633 $ 35,241