Property and Equipment (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 9,125		$ 9,153
Less: accumulated depreciation	(1,377)		(1,105)
Property and equipment, net	7,748		8,048
Depreciation expense	300	$ 200
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,465		$ 1,463
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)	7 years		7 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)	20 years		20 years
Machinery & equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 6,509		$ 6,066
Machinery & equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)	1 year		1 year
Machinery & equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)	12 years		12 years
Furniture
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 797		$ 843
Furniture | Minimum
Property, Plant and Equipment [Line Items]
Useful life (in years)	1 year		1 year
Furniture | Maximum
Property, Plant and Equipment [Line Items]
Useful life (in years)	12 years		12 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 354		$ 781