Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating expenses:
General and administrative expenses	$ 746	$ 1,935
Gain on sale of assets	(50)	(2,139)
Total operating (income) expenses	696	(204)
(Loss) income from operations	(696)	204
Other income and expenses:
Interest income		45
Total other income and expenses		45
Net (loss) income and comprehensive (loss) income	$ (696)	$ 249
Net (loss) income per common share - basic and diluted	$ (0.05)	$ 0.02
Weighted-average common shares used to compute basic and diluted net loss per common share	13,397	13,380