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Consolidated Balance Sheets - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Current assets    
Cash and cash equivalents $ 12,607 $ 20,469
Accounts receivables, net 277 174
Inventories 757 349
Prepaid expenses and other current assets 960 974
Total current assets 14,601 21,966
Property, plant and equipment, net 1,132 1,798
Total assets 15,733 23,764
Current liabilities    
Accounts payable 284 748
Accrued expenses 2,243 3,603
Warrant liability 3,785 225
Total current liabilities 6,312 4,576
Other non-current liabilities 820 1,043
Total liabilities 7,132 5,619
Commitments and contingencies 0 0
Stockholders' equity    
Preferred stock, $.01 par value; 10,000,000 shares authorized; no shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively 0 0
Common stock, $.01 par value; 170,000,000 shares authorized; 22,341,574 and 9,740,394 shares issued and 21,763,817 and 9,708,841 shares outstanding at December 31, 2015 and December 31, 2014, respectively 223 97
Additional paid-in capital 269,654 264,592
Accumulated deficit (261,217) (246,513)
Treasury stock, at cost; 1,757 shares at December 31, 2015 and December 31, 2014, respectively (51) (51)
Accumulated other comprehensive income (loss) (8) 20
Total stockholders' equity 8,601 18,145
Total liabilities and stockholders' equity $ 15,733 $ 23,764