Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Total revenues	$ 142	$ 139
Costs and expenses:
General and administrative	3,806	3,233
Depreciation	121	103
Total costs and expenses	3,927	3,336
Operating loss	(3,785)	(3,197)
Interest expense, net	(1,991)	(2,542)
Loss before income taxes	(5,776)	(5,739)
Income tax expense	(2)	(2)
Loss from equity-method investments	(134)	(203)
Net loss and comprehensive loss	(5,912)	(5,944)
Less: Preferred stock dividend	(1,265)	0
Net loss and comprehensive loss applicable to common stock	$ (7,177)	$ (5,944)
Basic and diluted net loss per common share (in dollars per share)	$ (0.16)	$ (0.16)
Basic and diluted weighted average shares outstanding (in shares)	44,433	37,834