Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Grant revenue	$ 765	$ 1,383
Total revenues	1,788	1,485
Expenses:
Research and development	10,562	17,376
General and administrative	7,421	6,657
Total operating expense	17,983	24,033
Operating loss	(16,195)	(22,548)
Other income / (expense):
Net loss on debt extinguishment	(3,345)
Gain on debt restructuring		5,824
Interest income	15	12
Interest expense	(1,409)	(1,863)
Other income, net	401	129
Other income / (expense), net	(4,338)	4,102
Net loss	(20,533)	(18,446)
AEROSURF warrant dividend	(12,505)
Deemed dividend on Series A preferred stock	(1,718)	(6,370)
Net loss attributable to common shareholders	$ (34,756)	$ (24,816)
Net loss per common share
Basic and diluted (in dollars per share)	$ (7.74)	$ (24.14)
Weighted average number of common shares outstanding
Basic and diluted (in shares)	4,493	1,028
License [Member]
License revenue with affiliate	$ 1,023	$ 102