Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 144,241	$ 183,419
Cash held in escrow	6,433	6,434
Marketable securities	121,118	42,411
Restricted cash equivalents	5,137	4,893
Prepaid expenses and other current assets	1,253	785
Total current assets	278,182	237,942
Property and equipment, net	260	295
Ownership interests in and advances to partner companies	117,417	60,256
Available-for-sale securities	5,694	25,447
Long-term marketable securities	15,019	0
Long-term restricted cash equivalents	7,128	11,881
Other	585	724
Total Assets	424,285	336,545
Current Liabilities:
Convertible senior debentures - current	0	31,289
Accounts payable	238	493
Accrued compensation and benefits	3,495	4,168
Accrued expenses and other current liabilities	4,033	4,223
Total current liabilities	7,766	40,173
Other long-term liabilities	4,133	5,311
Convertible senior debentures - non-current	45,531	44,630
Commitments and contingencies
Equity:
Preferred stock, $0.10 par value; 1,000 shares authorized
Common stock, $0.10 par value; 83,333 shares authorized; 20,728 and 20,630 shares; issued and outstanding in 2011 and 2010, respectively	2,073	2,063
Additional paid-in capital	810,404	806,859
Accumulated deficit	(440,171)	(575,307)
Accumulated other comprehensive income	(5,451)	12,816
Total equity	366,855	246,431
Total Liabilities and Equity	$ 424,285	$ 336,545