Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating expenses:
General and administrative	$ 580	$ 654	$ 883	$ 1,312
Research and development	508	442	858	1,024
Operating loss	(1,088)	(1,096)	(1,741)	(2,336)
Other (expense) income:
Grant income		12		22
Interest expense	(1,152)	(1,288)	(2,184)	(1,761)
Other (expense)	(101)	(192)	(68)	(273)
Total other expense	(1,253)	(1,468)	(2,252)	(2,012)
Loss before income tax benefit	(2,341)	(2,564)	(3,993)	(4,348)
Income tax benefit	70	79	141	108
Net loss	(2,271)	(2,485)	(3,852)	(4,240)
Foreign currency translation adjustment	49	101	17	169
Comprehensive loss	$ (2,222)	$ (2,384)	$ (3,835)	$ (4,071)
Basic and diluted net loss per share (in dollars per share)	$ (0.45)	$ (0.54)	$ (0.76)	$ (1)
Weighted average shares outstanding - basic and diluted (in shares)	5,070,341	4,570,601	5,071,378	4,248,603