Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenues	$ 153	$ 335
Operating expenses
Research and development	12,966	10,243
General and administrative	7,518	7,567
Total operating expenses	20,484	17,810
Loss from operations	(20,331)	(17,475)
Other (expense)/income
Interest expense	(186)	(643)
Impairment of Goodwill	(69)	0
Fair value adjustment of derivative liability	1	34
Other income, net	22	28
Total other (expense)/income	(232)	(581)
Net loss	$ (20,563)	$ (18,056)
Net loss per share attributable to common stockholders, basic and diluted	$ (4.98)	$ (9.32)
Weighted average shares used to compute basic and diluted net loss per share attributable to common stockholders	4,126,393	1,937,161