Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash	$ 12,048	$ 8,815
Accounts receivable	709	969
Projects in process	778	736
Prepaid expenses and other current assets	573	616
Total current assets	14,108	11,136
Deposits	17
Property and equipment, net	859	335
Total assets	14,984	11,471
Current liabilities:
Accounts payable	509	479
Accrued expenses	1,242	978
Deferred revenue	3,468	3,666
Current portion of capital lease obligations	71
Total current liabilities	5,290	5,123
Capital lease obligations, net of current portion	459
Total liabilities	5,749	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 June 30, 2014 and December 31, 2013, respectively	40	38
Additional paid-in capital	168,696	157,994
Accumulated other comprehensive income	76	11
Accumulated deficit	(159,577)	(151,695)
Total stockholders' equity	9,235	6,348
Total liabilities and stockholders' equity	14,984	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 June 30, 2014 and December 31, 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 over the shares of common stock)