CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 44,592	$ 7,703
Restricted cash	525	500
Marketable securities	32,905	37,955
Trading securities	306	0
Prepaid expenses and other current assets	3,380	2,669
Total current assets	81,708	48,827
Property and equipment, net	2,430	808
Ownership interests in and advances to partner companies	85,603	95,585
Other assets	712	517
Total Assets	170,453	145,737
Current Liabilities:
Accounts payable	110	165
Accrued compensation and benefits	1,652	3,433
Accrued expenses and other current liabilities	2,170	2,182
Credit facility - current	65,687	22,100
Credit facility repayment feature	7,069	5,060
Lease liability - current	250
Total current liabilities	76,938	32,940
Credit facility - non-current	0	43,014
Lease liability - non-current	2,597
Other long-term liabilities	2,039	2,804
Total Liabilities	81,574	78,758
Commitments and contingencies (Note 10)
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 March 31, 2019 and December 31, 2018	2,157	2,157
Additional paid-in capital	811,352	810,928
Treasury stock, at cost; 998 and 914 shares at March 31, 2019 and December 31, 2018, respectively	(15,157)	(15,001)
Accumulated deficit	(709,442)	(731,105)
Accumulated other comprehensive loss	(31)	0
Total Equity	88,879	66,979
Total Liabilities and Equity	$ 170,453	$ 145,737