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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Current assets    
Cash and cash equivalents $ 14,053 $ 20,469
Accounts receivables, net 460 174
Inventories 281 349
Prepaid expenses and other current assets 1,097 974
Total current assets 15,891 21,966
Property, plant and equipment, net 1,498 1,798
Total assets 17,389 23,764
Current liabilities    
Accounts payable 528 748
Accrued expenses 2,060 3,603
Warrant liability 761 225
Total current liabilities 3,349 4,576
Other non-current liabilities 929 1,043
Total liabilities $ 4,278 $ 5,619
Commitments and Contingencies    
Stockholders' equity    
Preferred stock, $.01 par value; 10,000,000 shares authorized; no shares issued and outstanding at June 30, 2015 and December 31, 2014, respectively    
Common stock, $.01 par value; 170,000,000 shares authorized; 12,991,707and 9,740,397 shares issued and 12,385,016 and 9,708,841 shares outstanding at June 30, 2015 and December 31, 2014, respectively $ 130 $ 97
Additional paid-in capital 266,721 264,592
Accumulated deficit (253,702) (246,513)
Treasury stock, at cost; 1,757 shares at June 30, 2015 and December 31, 2014, respectively (51) (51)
Accumulated other comprehensive income 13 20
Total stockholders' equity 13,111 18,145
Total liabilities and stockholders' equity $ 17,389 $ 23,764