BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 13,092	$ 8,061
Short-term investments available-for-sale	9,229	23,615
Accounts receivables	1,832	54
Unbilled receivables	2,020	0
Prepaid expenses and other current assets	2,243	1,607
Total current assets	28,416	33,337
Property and equipment, net	7,629	8,206
Goodwill	33,141	33,141
Other non-current assets	160	160
Total assets	69,346	74,844
Current liabilities:
Accounts payable	2,961	3,572
Accrued expenses and other current liabilities	3,110	6,273
Current portion of notes payable	60	80
Deferred revenue	2,500	0
Deferred rent	364	341
Total current liabilities	8,995	10,266
Warrant liability	1,605	2,842
Non-current portion of notes payable	300	320
Deferred rent	2,175	2,366
Total liabilities	13,075	15,794
Commitments and contingences	0	0
Stockholders' equity:
Preferred stock, $0.01 par value, 2,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value, 200,000,000 shares authorized; and 115,125,113 shares issued and 114,669,683 shares outstanding at June 30, 2011 and 111,492,014 shares issued and 111,036,584 shares outstanding at December 31, 2010	1,151	1,115
Additional paid-in capital	380,970	371,477
Notes receivable from former directors	(1,572)	(1,572)
Accumulated deficit	(322,738)	(310,292)
Treasury stock, 455,430 shares, cost basis	(2,450)	(2,450)
Accumulated other comprehensive income	910	772
Total stockholders' equity	56,271	59,050
Total liabilities and stockholders' equity	$ 69,346	$ 74,844