Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Total revenues	$ 114	$ 109
Costs and expenses:
General and administrative	3,977	2,924
Depreciation	79	66
Total costs and expenses	4,056	2,990
Operating loss	(3,942)	(2,881)
Interest expense, net	(3,572)	(4,234)
Interest income	22	53
Debt conversion expense		(197)
Loss on extinguishment of debt	(12,396)
Loss before income taxes	(19,886)	(7,259)
Income tax expense	(2)	(1)
Loss from equity-method investments	(626)
Net loss and comprehensive loss applicable to common stock	$ (20,514)	$ (7,260)
Basic and diluted net loss per common share (in dollars per share)	$ (0.66)	$ (0.29)
Basic and diluted weighted average shares outstanding (in shares)	31,113	25,327