Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating expenses:
General and administrative expenses	$ 2,616	$ 5,012
Gain on sales of assets	(144)	(2,139)
Total operating expenses	2,472	2,873
Loss from continuing operations	(2,472)	(2,873)
Other income and expenses:
Interest income	20	50
Other income (expense), net		(191)
Total other income and expenses	20	(141)
Loss before income tax benefit	(2,452)	(3,014)
Income tax expense	(3)	(14)
Net loss and comprehensive loss	$ (2,455)	$ (3,028)
Net loss per common share - basic and diluted	$ (0.18)	$ (0.23)
Weighted-average common shares used to compute basic and diluted net loss per common share	13,407	13,380