Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Assets	$ 19,028		$ 19,028		$ 17,770
Property & equipment, net	1,563		1,563		1,557
Intangible assets	10,518		10,518		$ 10,518
Revenues	1,686	$ 2,339	4,854	$ 7,286
Net income (loss)	(1,605)	(306)	(4,185)	(1,130)
UnitedStatesMember
Segment Reporting Information [Line Items]
Revenues	118	182	542	735
Net income (loss)	(830)	(376)	(2,067)	(1,353)
GERMANY
Segment Reporting Information [Line Items]
Assets	6,055		6,055
Property & equipment, net	1,511		1,511
Intangible assets	0		0
Revenues	1,556	2,137	4,287	6,513
Net income (loss)	(884)	70	(2,021)	314
PolandMember
Segment Reporting Information [Line Items]
Revenues	12	20	25	38
Net income (loss)		$ 0	(97)	$ (91)
UNITED STATES
Segment Reporting Information [Line Items]
Assets	12,928		12,928
Property & equipment, net	52		52
Intangible assets	10,518		10,518
POLAND
Segment Reporting Information [Line Items]
Assets	45		45
Property & equipment, net	0		0
Intangible assets	$ 0		$ 0