Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 24,739	$ 15,601
Restricted cash	25	0
Ownership interests	4,549	0
Prepaid expenses and other current assets	965	462
Total current assets	30,278	16,063
Right-of-use asset, net	1,561	1,790
Ownership interests and advances	21,972	50,398
Other assets	217	784
Total Assets	54,028	69,035
Current Liabilities:
Accounts payable	41	56
Accrued compensation and benefits	794	2,677
Accrued expenses and other current liabilities	524	410
Lease liability - current	375	327
Total current liabilities	1,734	3,470
Other long-term liabilities	50	637
Lease liability - non-current	1,678	2,053
Total Liabilities	3,462	6,160
Commitments and contingencies (Note 11)
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 issued at December 31, 2021 and 2020, respectively	2,157	2,157
Additional paid-in capital	806,638	807,582
Treasury stock, at cost; 5,068 and 688 shares at December 31, 2021 and 2020, respectively	(48,569)	(10,200)
Accumulated deficit	(709,635)	(736,639)
Accumulated other comprehensive loss	(25)	(25)
Total Equity	50,566	62,875
Total Liabilities and Equity	$ 54,028	$ 69,035