Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Assets	$ 18,482		$ 18,378
Property & equipment, net	1,977		1,941
Intangible assets	10,518		10,518
Revenues	2,131	$ 2,287
Net income (loss)	(622)	(255)
UNITED STATES
Segment Reporting Information [Line Items]
Assets	11,435		11,826
Property & equipment, net	79		84
Intangible assets	10,518		10,518
Revenues	274	280
Net income (loss)	(490)	(163)
GERMANY
Segment Reporting Information [Line Items]
Assets	6,862		6,357
Property & equipment, net	1,895		1,853
Intangible assets	0		0
Revenues	1,842	2,003
Net income (loss)	(89)	(76)
POLAND
Segment Reporting Information [Line Items]
Assets	185		195
Property & equipment, net	3		4
Intangible assets	0		$ 0
Revenues	15	4
Net income (loss)	$ (43)	$ (16)