CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 63,708	$ 111,897
Marketable securities	29,760	25,263
Prepaid expenses and other current assets	2,011	1,684
Total current assets	95,479	138,844
Property and equipment, net	1,438	123
Ownership interests in and advances to partner companies	162,988	154,192
Loan participations receivable	2,640	3,855
Long-term marketable securities	10,705	19,365
Other assets	1,903	2,075
Total Assets	275,153	318,454
Current Liabilities:
Accounts payable	253	226
Accrued compensation and benefits	3,137	3,997
Accrued expenses and other current liabilities	3,644	2,334
Total current liabilities	7,034	6,557
Other long-term liabilities	3,928	3,507
Convertible senior debentures	51,441	50,563
Total Liabilities	$ 62,403	$ 60,627
Commitments and contingencies
Equity:
Preferred stock, $0.10 par value; 1,000 shares authorized	$ 0	$ 0
Common stock, $0.10 par value; 83,333 shares authorized; 21,573 shares issued at September 30, 2015 and December 31, 2014	2,157	2,157
Additional paid-in capital	818,671	819,757
Treasury stock, at cost; 877 and 921 shares at September 30, 2015 and December 31, 2014, respectively	(18,079)	(19,341)
Accumulated deficit	(589,999)	(544,746)
Total Equity	212,750	257,827
Total Liabilities and Equity	$ 275,153	$ 318,454