Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Current Assets:
Cash and cash equivalents	$ 15,033	$ 24,739
Restricted cash	25	25
Marketable securities	5,953	0
Ownership interests	1,389	4,549
Prepaid expenses and other current assets	1,414	965
Total current assets	23,814	30,278
Right-of-use asset, net	1,362	1,561
Ownership interests and advances	17,870	21,972
Other assets	344	217
Total Assets	43,390	54,028
Current Liabilities:
Accounts payable	9	41
Accrued compensation and benefits	413	794
Accrued expenses and other current liabilities	1,034	524
Lease liability - current	415	375
Total current liabilities	1,871	1,734
Lease liability - non-current	1,362	1,678
Other long-term liabilities	50	50
Total Liabilities	3,283	3,462
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 September 30, 2022 and December 31, 2021	2,157	2,157
Additional paid-in capital	804,712	806,638
Treasury stock, at cost; 5,235 and 5,068 shares at September 30, 2022 and December 31, 2021, respectively	(47,712)	(48,569)
Accumulated deficit	(719,025)	(709,635)
Accumulated other comprehensive loss	(25)	(25)
Total Equity	40,107	50,566
Total Liabilities and Equity	$ 43,390	$ 54,028