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Condensed Consolidated Balance Sheets (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Current assets:    
Cash $ 8,844 $ 8,815
Accounts receivable, net 558 969
Projects in process 503 736
Prepaid expenses and other current assets 651 616
Total current assets 10,556 11,136
Property and equipment, net 758 335
Total assets 11,314 11,471
Current liabilities:    
Accounts payable 651 479
Accrued expenses 848 978
Deferred revenue 3,252 3,666
Current portion of capital lease obligations 66   
Total current liabilities 4,817 5,123
Capital lease obligations, net of current portion 410   
Total liabilities 5,227 5,123
Commitments and contingencies (Note 6)      
Stockholders' equity:    
Common stock, 70,000,000 shares authorized with par value $0.001 per share; 40,455,352 and 37,933,799 shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively 40 38
Additional paid-in capital 168,875 157,994
Accumulated other comprehensive (loss) income (6) 11
Accumulated deficit (162,822) (151,695)
Total stockholders' equity 6,087 6,348
Total liabilities and stockholders ' equity 11,314 11,471
Series B Preferred Stock
   
Stockholders' equity:    
Series B Preferred stock, 54,425 shares authorized with par value $0.001 per share; 83 shares issued and outstanding at September 30, 2014 and December 31, 2013. (In the event of dissolution, each share of Series B Preferred stock has a liquidation preference equal to par value of $0.001 over the shares of common stock)