Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 30,555	$ 50,454
Restricted cash	100
Accounts receivable	5,980	7,426
Deferred financing costs	2,631	1,946
Prepaid expenses and other current assets	6,526	5,763
Total current assets	45,792	65,589
Restricted cash	381	381
Property and equipment, net	5,232	6,206
Other assets	23	23
Intangible assets, net	2,405	2,485
In-process research and development	7,010	7,010
Goodwill	3,605	3,605
Total assets	64,448	85,299
Current liabilities:
Accounts payable	2,599	4,656
Accrued expenses and other	13,061	12,855
Capital lease obligations	10	48
Deferred revenue	8,245	7,712
Deferred lease benefit	135	125
Deferred tax incentives	755	755
Total current liabilities	24,805	26,151
Deferred revenues	80,862	78,033
Deferred lease benefits	231	23
Deferred tax incentives	1,199	1,267
Convertible preferred stock warrants	957	1,516
Total liabilities	108,054	106,990
Commitments and contingencies (Note 10)
Convertible preferred stock	268,225	268,225
Non-controlling interest	456	574
Stockholders' deficit:
Common stock, 138,500 and 200,000 authorized $0.01 par value shares at December 31, 2011 and March 31, 2012, respectively, 11,834 and 11,907 issued and outstanding at December 31, 2011 and March 31, 2012, respectively	119	118
Additional paid-in capital	61,717	60,231
Accumulated deficit	(374,123)	(350,839)
Total stockholders' deficit	(312,287)	(290,490)
Total liabilities, convertible preferred stock, non-controlling interest and stockholders' deficit	$ 64,448	$ 85,299