Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment

Schedule of property, plant and equipment

	As of December 31
(in thousands)	2016			2017
IT equipment	$	642		$	1,060
Laboratory equipment		2,613			3,299
Other equipment		15			15
		3,270			4,374
Less: Accumulated depreciation		(2,751	)		(3,047	)
Property, plant and equipment, net	$	519		$	1,327