Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 16,437	$ 25,028
Restricted cash	0	25
Prepaid expenses and other current assets	570	1,297
Total current assets	17,007	26,350
Property and equipment, net	1,869	2,101
Ownership interests in and advances	55,844	77,129
Other assets	1,368	1,997
Total Assets	76,088	107,577
Current Liabilities:
Accounts payable	36	39
Accrued compensation and benefits	1,706	1,364
Accrued expenses and other current liabilities	531	627
Lease liability - current	338	399
Total current liabilities	2,611	2,429
Lease liability - non-current	2,139	2,380
Other long-term liabilities	1,109	1,027
Total Liabilities	5,859	5,836
Commitments and contingencies (Note 9)
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, 2020 and December 31, 2019	2,157	2,157
Additional paid-in capital	809,189	810,856
Treasury stock, at cost; 789 and 930 shares at September 30, 2020 and December 31, 2019, respectively	(11,806)	(14,024)
Accumulated deficit	(729,286)	(697,223)
Accumulated other comprehensive loss	(25)	(25)
Total Equity	70,229	101,741
Total Liabilities and Equity	$ 76,088	$ 107,577