Property, Plant and Equipment, Net - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Land and land improvements	$ 11,815	$ 11,767
Buildings and building improvements	18,160	18,183
Furniture and fixtures	2,516	2,515
Equipment	69,568	65,863
Leasehold improvements	27,811	25,277
Breeding stock	4,204	3,832
Computer hardware and software	10,442	10,128
Trees	7,996	6,642
Construction and other assets in progress	15,819	14,113
Property, plant and equipment, gross	168,331	158,320
Less: Accumulated depreciation and amortization	(49,087)	(45,646)
Property, plant and equipment, net	$ 119,244	$ 112,674