Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 66,322	$ 94,310
Marketable securities		2,079
Receivables		995
Prepaid expenses and other current assets	188	497
Total current assets	66,510	97,881
Property and equipment, net		84
Total assets	66,510	97,965
Current liabilities:
Accounts payable	333	146
Accrued expenses and other current liabilities	2,736	1,918
Deferred revenue	2,526	2,526
Liabilities of discontinued operations		1,662
Total current liabilities	5,595	6,252
Deferred revenue	30,948	32,842
Total liabilities	36,543	39,094
Stockholders' equity:
Convertible preferred stock
Common stock	6,357	6,359
Capital in excess of par value	375,995	373,157
Treasury stock	(117,048)	(92,567)
Accumulated deficit	(235,337)	(228,078)
Total stockholders' equity	29,967	58,871
Total liabilities and stockholders' equity	$ 66,510	$ 97,965