Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating expenses:
Compensation and benefits	$ 336	$ 328	$ 1,098	$ 1,075
Professional and outside services	836	1,049	2,783	2,535
Property operating and maintenance	3	5	14	16
Insurance	68	100	192	186
Other operating	21	12	46	68
Total operating expenses	1,264	1,494	4,133	3,880
Operating income (loss)	(1,264)	(1,494)	(4,133)	(3,880)
Interest income	0	1	1	7
Income (loss) before income taxes	(1,264)	(1,493)	(4,132)	(3,873)
Income tax expense (benefit)	0	(30)	1	(28)
Net income (loss)	$ (1,264)	$ (1,463)	$ (4,133)	$ (3,845)
Net income (loss) per common share - basic (in dollars per share)	$ (0.03)	$ (0.04)	$ (0.10)	$ (0.09)
Weighted average common shares outstanding - basic (in shares)	40,738	40,738	40,738	40,738