Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 27,909	$ 50,454
Available-for-sale securities	58,759
Restricted cash	100
Accounts receivable	6,054	7,426
Deferred financing costs		1,946
Prepaid expenses and other current assets	11,259	5,763
Total current assets	104,081	65,589
Restricted cash	381	381
Property and equipment, net	4,834	6,206
Other assets	1,055	23
Intangible assets, net	2,245	2,485
In-process research and development	7,010	7,010
Goodwill	3,605	3,605
Total assets	123,211	85,299
Current liabilities:
Accounts payable	771	4,656
Accrued expenses and other	16,759	12,855
Dividends payable	88
Capital lease obligations		48
Deferred revenues	8,764	7,712
Deferred lease benefits	1,295	125
Deferred tax incentives	512	755
Total current liabilities	28,189	26,151
Deferred revenues	74,980	78,033
Deferred lease benefits	6,140	23
Deferred tax incentives	883	1,267
Convertible preferred stock warrants		1,516
Total liabilities	110,192	106,990
Commitments and contingencies (Note 10)
Convertible preferred stock		268,225
Non-controlling interest	222	574
Stockholders' (deficit) equity:
Preferred stock, $0.01 par value: no shares and 10,000 shares authorized at December 31, 2011 and September 30, 2012, respectively; no shares issued or outstanding at December 31, 2011 and September 30, 2012, respectively
Common stock, $0.01 par value: 138,500 and 200,000 shares authorized at December 31, 2011 and September 30, 2012, respectively; 11,834 and 94,029 shares issued and outstanding at December 31, 2011 and September 30, 2012, respectively	940	118
Additional paid-in capital	429,195	60,231
Accumulated other comprehensive income	10
Accumulated deficit	(417,348)	(350,839)
Total stockholders' (deficit) equity	12,797	(290,490)
Total liabilities, convertible preferred stock, non-controlling interest and stockholders' (deficit) equity	$ 123,211	$ 85,299