Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current assets:
Cash	$ 6,129	$ 8,815
Accounts receivable, net	1,106	969
Projects in process	200	736
Prepaid expenses and other current assets	513	616
Total current assets	7,948	11,136
Property and equipment, net	654	335
Total assets	8,602	11,471
Current liabilities:
Accounts payable	566	479
Accrued expenses	935	978
Deferred revenues	3,403	3,666
Current portion of capital lease obligation	61
Total current liabilities	4,965	5,123
Capital lease obligation, net of current portion	367
Total liabilities	5,332	5,123
Commitments and contingencies (Note 10)
Stockholders' equity:
Common stock, 70,000,000 shares authorized at December 31, 2014 and 2013, with par value of $0.001 per share; 40,455,352 and 37,933,799 shares issued and outstanding at December 31, 2014 and 2013, respectively	40	38
Additional paid-in capital	169,010	157,994
Accumulated other comprehensive income	149	11
Accumulated deficit	(165,929)	(151,695)
Total stockholders' equity	3,270	6,348
Total liabilities and stockholders' equity	8,602	11,471
Series B Preferred Stock
Stockholders' equity:
Series B Preferred stock, 54,425 shares authorized with par value of $0.001 per share; 83 shares issued and outstanding at December 31, 2014 and 2013, respectively. (In the event of dissolution, each share of Series B Preferred stock has a liquidation preference equal to par value of $0.001 per share over the shares of common stock)