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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Current assets    
Cash and cash equivalents $ 9,545 $ 12,607
Accounts receivables, net 197 277
Inventories 835 757
Prepaid expenses and other current assets 880 960
Total current assets 11,457 14,601
Property, plant and equipment, net 1,070 1,132
Total assets 12,527 15,733
Current liabilities    
Accounts payable 128 284
Accrued expenses 1,723 2,243
Warrant liability 2,051 3,785
Total current liabilities 3,902 6,312
Other non-current liabilities 767 820
Total liabilities 4,669 7,132
Commitments and Contingencies 0 0
Stockholders' equity    
Preferred stock, $.01 par value; 10,000,000 shares authorized; no shares issued and outstanding at March 31, 2016 and December 31, 2015, respectively 0 0
Common stock, $.01 par value; 170,000,000 shares authorized; 24,696,248 and 22,341,574 shares issued and 24,118,491 and 21,763,817 shares outstanding at March 31, 2016 and December 31, 2015, respectively 247 223
Additional paid-in capital 270,692 269,654
Accumulated deficit (263,030) (261,217)
Treasury stock, at cost; 1,757 shares at March 31, 2016 and December 31, 2015, respectively (51) (51)
Accumulated other comprehensive income 0 (8)
Total stockholders' equity 7,858 8,601
Total liabilities and stockholders' equity $ 12,527 $ 15,733