Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 21,305	$ 15,601
Restricted cash	25	0
Ownership interests	22,694	0
Prepaid expenses and other current assets	1,221	462
Total current assets	45,245	16,063
Property and equipment, net	1,680	1,790
Ownership interests and advances	37,391	50,398
Other assets	320	784
Total Assets	84,636	69,035
Current Liabilities:
Accounts payable	29	56
Accrued compensation and benefits	2,493	2,677
Accrued expenses and other current liabilities	446	410
Lease liability - current	350	327
Total current liabilities	3,318	3,470
Lease liability - non-current	1,872	2,053
Other long-term liabilities	50	637
Total Liabilities	5,240	6,160
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 and outstanding at June 30, 2021 and December 31, 2020	2,157	2,157
Additional paid-in capital	806,447	807,582
Treasury stock, at cost; 786 and 688 shares at June 30, 2021 and December 31, 2020, respectively	(9,849)	(10,200)
Accumulated deficit	(719,334)	(736,639)
Accumulated other comprehensive loss	(25)	(25)
Total Equity	79,396	62,875
Total Liabilities and Equity	$ 84,636	$ 69,035