Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating expenses:
Research and development	$ 2,219	$ 11,165
General and administrative	9,112	7,866
Total operating expenses	11,331	19,031
Loss from operations	(11,331)	(19,031)
Other income (expense):
Interest expense	(852)	(3,056)
Other income, net	324	431
Reorganization items, net	(145)	(331)
Net loss	(12,004)	(21,987)
Other comprehensive income
Comprehensive loss	$ (12,004)	$ (21,987)
Basic and diluted net loss per common share	$ (0.13)	$ (1.47)
Weighted average common shares outstanding used to calculate basic and diluted net loss per common share	94,756,375	14,975,370