Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating expenses:
Research and development	$ 1,398	$ 3,384
General and administrative	3,434	3,285
Total operating expenses	4,832	6,669
Operating loss	(4,832)	(6,669)
Other income (expense):
Interest income / (expense)	18	37
Other income / (expense)	42
Derivatives gain (loss)	(12)	241
Other income (expense), net	48	278
Net loss	$ (4,784)	$ (6,391)
Net loss per share, basic and diluted (in dollars per share)	$ (3.34)	$ (4.98)
Weighted average number of common shares outstanding, basic and diluted	1,432,963	1,283,206
Other comprehensive loss:
Net loss	$ (4,784)	$ (6,391)
Other comprehensive loss:
Unrealized gain (loss) on marketable securities		(2)
Comprehensive loss	$ (4,784)	$ (6,393)