Property, Plant and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property Plant And Equipment [Line Items]
Amortization of capital lease asset	$ 100	$ 100	$ 100
Depreciation and amortization	6,747	6,573	4,880
Depreciation expense in cost of goods sold	6,000	5,700	$ 4,000
Computer, office equipment and software
Property Plant And Equipment [Line Items]
Capital lease	$ 700	$ 700