Condensed Consolidated Statements of Operations and Comprehensive (Loss) Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating expenses:
General and administrative expenses	$ 778	$ 1,184	$ 1,524	$ 3,119
Gain on sale of assets			(50)	(2,139)
Total operating expenses	778	1,184	1,474	980
Loss from operations	(778)	(1,184)	(1,474)	(980)
Other income:
Interest income	19	3	19	48
Other income, net		18		18
Total other income	19	21	19	66
Net loss and comprehensive loss	$ (759)	$ (1,163)	$ (1,455)	$ (914)
Net loss per common share - basic and diluted	$ (0.06)	$ (0.09)	$ (0.11)	$ (0.07)
Weighted-average common shares used to compute basic and diluted net loss per common share	13,410	13,380	13,404	13,380