Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income - 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:
General and administrative expenses	$ 619	$ 1,007	$ 2,143	$ 4,126
Gain on sale of assets	(94)		(144)	(2,139)
Total operating expenses	525	1,007	1,999	1,987
Loss from operations	(525)	(1,007)	(1,999)	(1,987)
Other income:
Interest income		1	19	49
Other income, net				18
Total other income		1	19	67
Net loss and comprehensive loss	$ (525)	$ (1,006)	$ (1,980)	$ (1,920)
Net loss per common share - basic and diluted	$ (0.04)	$ (0.08)	$ (0.15)	$ (0.14)
Weighted-average common shares used to compute basic and diluted net loss per common share	13,410	13,380	13,406	13,380