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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Current assets    
Cash and cash equivalents $ 31,254 $ 31,249
Accounts receivables, net 181 349
Inventories, net 619 719
Prepaid expenses and other current assets 1,292 1,711
Total current assets 33,346 34,028
Property, plant and equipment, net 2,738 3,069
Total assets 36,084 37,097
Current liabilities    
Accounts payable 334 582
Accrued expenses 3,476 3,740
Warrant liability 2,399 2,310
Total current liabilities 6,209 6,632
Other non-current liabilities 225 366
Total liabilities 6,434 6,638
Commitments and contingencies (Note 12)      
Stockholders' equity    
Preferred stock, $.01 par value; 10,000,000 shares authorized; no shares issued and outstanding at March 31, 2014 and December 31, 2013 0 0
Common stock, $.01 par value; 170,000,000 shares authorized; 9,433,703 and 8,394,397 shares issued and 9,431,907 and 8,392,641 shares outstanding at March 31, 2014 and December 31, 2013, respectively 94 [1] 84 [1]
Additional paid-in capital 263,923 259,102
Accumulated deficit (234,410) (229,132)
Treasury stock, at cost; 1,757 shares at March 31, 2014 and December 31, 2013 (51) [1] (51) [1]
Accumulated other comprehensive income 94 96
Total stockholders' equity 29,650 30,099
Total liabilities and stockholders' equity $ 36,084 $ 37,097
[1] Reflects a one-for- sixteen (1:16) reverse stock split effected on April 8, 2014.