Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 32,043	$ 50,454
Available-for-sale securities	74,669
Restricted cash	100
Accounts receivable	6,940	7,426
Deferred financing costs		1,946
Prepaid expenses and other current assets	6,570	5,763
Total current assets	120,322	65,589
Restricted cash	381	381
Property and equipment, net	5,040	6,206
Other assets	23	23
Intangible assets, net	2,325	2,485
In-process research and development	7,010	7,010
Goodwill	3,605	3,605
Total assets	138,706	85,299
Current liabilities:
Accounts payable	2,745	4,656
Accrued expenses and other	14,113	12,855
Dividends payable	261
Capital lease obligations		48
Deferred revenues	8,562	7,712
Deferred lease benefits	115	125
Deferred tax incentives	876	755
Total current liabilities	26,672	26,151
Deferred revenues	77,736	78,033
Deferred lease benefits	202	23
Deferred tax incentives	1,011	1,267
Convertible preferred stock warrants		1,516
Total liabilities	105,621	106,990
Commitments and contingencies (Note 10)
Convertible preferred stock		268,225
Non-controlling interest	343	574
Stockholders' (deficit) equity:
Preferred stock, $0.01 par value: no shares and 10,000 shares authorized at December 31, 2011 and June 30, 2012, respectively; no shares issued or outstanding at December 31, 2011 and June 30, 2012, respectively
Common stock, $0.01 par value: 138,500 and 200,000 shares authorized at December 31, 2011 and June 30, 2012, respectively; 11,834 and 93,540 shares issued and outstanding at December 31, 2011 and June 30, 2012, respectively	935	118
Additional paid-in capital	426,005	60,231
Accumulated other comprehensive loss	(49)
Accumulated deficit	(394,149)	(350,839)
Total stockholders' (deficit) equity	32,742	(290,490)
Total liabilities, convertible preferred stock, non-controlling interest and stockholders' (deficit) equity	$ 138,706	$ 85,299