Property and Equipment, net (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment [Table Text Block]

The principal categories of property and equipment, net at December 31, 2015 and 2014 are as follows:  

	2015		2014
Laboratory equipment	$	9,963	$	9,801
Office and computer equipment		2,968		3,288
Furniture, fixtures and fittings		4,315		4,544
Less - accumulated depreciation		(14,630)		(15,857)
Total	$	2,616	$	1,776