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Condensed Consolidated Balance Sheets (Unaudited) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Current assets    
Cash and cash equivalents $ 27,284 $ 31,249
Accounts receivables, net 172 349
Inventories, net 600 719
Prepaid expenses and other current assets 852 1,711
Total current assets 28,908 34,028
Property, plant and equipment, net 2,421 3,069
Total assets 31,329 37,097
Current liabilities    
Accounts payable 239 582
Accrued expenses 4,087 3,740
Warrant liability 1,075 2,310
Total current liabilities 5,401 6,632
Other non-current liabilities 748 366
Total liabilities 6,149 6,998
Commitments and contingencies (Note 11)      
Stockholders' equity    
Preferred stock, $.01 par value; 10,000,000 shares authorized; no shares issued and outstanding at June 30, 2014 and December 31, 2013 0 0
Common stock, $.01 par value; 170,000,000 shares authorized; 9,451,870 and 8,394,397 shares issued and 9,447,392 and 8,392,641 shares outstanding at June 30, 2014 and December 31, 2013, respectively * 95 [1] 84 [1]
Additional paid-in capital 264,072 259,102
Accumulated deficit (239,010) (229,132)
Treasury stock, at cost; 1,757 shares at June 30, 2014 and December 31, 2013 * (51) [1] (51) [1]
Accumulated other comprehensive income 74 96
Total stockholders' equity 25,180 30,099
Total liabilities and stockholders' equity $ 31,329 $ 37,097
[1] Reflects a one-for- sixteen (1:16) reverse stock split effected on April 8, 2014.