CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 52,496	$ 32,838
Marketable securities	13,816	31,020
Prepaid expenses and other current assets	1,906	5,810
Total current assets	68,218	69,668
Property and equipment, net	1,955	2,145
Ownership interests in and advances to partner companies	172,941	171,601
Loan participations receivable	0	2,649
Long-term marketable securities	10,328	9,743
Other assets	296	1,037
Total Assets	253,738	256,843
Current Liabilities:
Accounts payable	110	290
Accrued compensation and benefits	3,259	3,338
Accrued expenses and other current liabilities	3,136	2,789
Total current liabilities	6,505	6,417
Other long-term liabilities	3,947	3,965
Convertible senior debentures	52,145	50,956
Total Liabilities	62,597	61,338
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, 2016 and December 31, 2015	2,157	2,157
Additional paid-in capital	817,887	817,434
Treasury stock, at cost; 1,335 and 993 shares at September 30, 2016 and December 31, 2015, respectively	(23,467)	(19,570)
Accumulated deficit	(605,203)	(604,270)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(233)	(246)
Total Equity	191,141	195,505
Total Liabilities and Equity	$ 253,738	$ 256,843