Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Operating expenses:
General and administrative expenses	$ 2,174	$ 2,616
Gain on sales of assets	(445)	(144)
Total operating expenses	1,729	2,472
Loss from operations	(1,729)	(2,472)
Other income and expenses:
Interest income	188	20
Loss before income tax expense	(1,541)	(2,452)
Income tax expense	(3)	(3)
Net loss and comprehensive loss	$ (1,544)	$ (2,455)
Net loss per common share - basic	$ (0.11)	$ (0.18)
Net loss per common share - diluted	$ (0.11)	$ (0.18)
Weighted-average common shares used to compute basic net loss per common share	13,524	13,407
Weighted-average common shares used to compute diluted net loss per common share	13,524	13,407