Property And Equipment, Net - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Land	$ 1,196	$ 1,120
Equipment	5,123	3,955
Furniture and fixtures	975	836
Computer hardware	1,395	338
Leasehold improvements	1,326	948
Construction in process	3,225	670
Property and equipment, gross	13,240	7,867
Less: accumulated depreciation	(3,589)	(2,057)
Property and equipment, net	$ 9,651	$ 5,810