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Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Current assets:    
Cash and cash equivalents $ 21,319 $ 29,128
Prepaid expenses and other current assets 183 533
Total current assets 21,502 29,661
Property and equipment, net   1
Intangible assets, net 10 15
Total assets 21,512 29,677
Current liabilities:    
Accounts payable 929 906
Accrued expenses 797 729
Accrued dividends payable   68
Total liabilities $ 1,726 $ 1,703
Commitments and contingencies (Note 8)
Stockholders' equity:    
Undesignated stock, $0.01 par value; 20,000,000 shares authorized, 8,001,000 designated at September 30, 2015 and December 31, 2014
Series A 12% convertible preferred stock; 5,000,000 shares authorized, 1,377,500 and 1,402,500 issued and outstanding at September 30, 2015 and December 31, 2014, respectively, liquidation value $1,377,500 at September 30, 2015 $ 557 $ 567
Common stock, $0.001 par value; 50,000,000 shares authorized at September 30, 2015 and December 31, 2014, 23,929,244 and 22,277,283 issued and outstanding at September 30, 2015 and December 31, 2014, respectively 23 22
Additional paid-in capital 147,338 139,531
Retained deficit (135,083) (118,925)
Total stockholders' equity 12,835 21,195
Total liabilities, redeemable convertible preferred stock and stockholders' equity 21,512 29,677
Series B-1 12% redeemable convertible preferred stock    
Current liabilities:    
Convertible preferred stock, value 1,744 1,731
Series B-2 12% redeemable convertible preferred stock    
Current liabilities:    
Convertible preferred stock, value 3,484 3,325
Series C super dividend convertible preferred stock    
Current liabilities:    
Convertible preferred stock, value $ 1,723 $ 1,723