Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment
Property, plant and equipment, gross	$ 6,247	$ 4,595
Less: Accumulated depreciation	(3,773)	(3,456)
Property, plant and equipment, net	2,474	1,139
IT equipment
Property, Plant and Equipment
Property, plant and equipment, gross	1,060	1,079
Laboratory equipment
Property, Plant and Equipment
Property, plant and equipment, gross	3,375	3,392
ROU asset
Property, Plant and Equipment
Property, plant and equipment, gross	1,647
Other equipment
Property, Plant and Equipment
Property, plant and equipment, gross	$ 165	$ 124