BALANCE SHEETS (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 14,318	$ 8,061
Short-term investments available-for-sale	5,286	23,615
Accounts receivables	17	54
Unbilled receivables	3,848	0
Prepaid expenses	2,392	1,342
Other current assets	392	265
Total current assets	26,253	33,337
Property and equipment, net	7,531	8,206
Goodwill	33,141	33,141
Other non-current assets	160	160
Total assets	67,085	74,844
Current liabilities:
Accounts payable	2,395	3,572
Accrued expenses and other current liabilities	3,931	6,273
Current portion of notes payable	40	80
Deferred rent	375	341
Total current liabilities	6,741	10,266
Warrant liability	869	2,842
Deferred revenue	2,500	0
Non-current portion of notes payable	300	320
Deferred rent	2,078	2,366
Total liabilities	12,488	15,794
Commitments and contingences
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 115,387,768 shares issued and 114,932,338 shares outstanding at September 30, 2011 and 111,492,014 shares issued and 111,036,584 shares outstanding at December 31, 2010	1,154	1,115
Additional paid-in capital	380,931	371,477
Notes receivable from former directors	0	(1,572)
Accumulated deficit	(325,951)	(310,292)
Treasury stock, 455,430 shares, cost basis	(2,450)	(2,450)
Accumulated other comprehensive income	913	772
Total stockholders' equity	54,597	59,050
Total liabilities and stockholders' equity	$ 67,085	$ 74,844