Product and Geographic Sales Information - Summary of Long-lived Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	$ 80,986	$ 83,190	$ 84,028
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	64,141	60,373	62,577
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	5,493	6,376	6,881
Americas, Excluding United States and Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	1,301	1,499	66
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	4,336	10,204	9,426
Asia-Pacific and Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Long-lived Assets	$ 5,715	$ 4,738	$ 5,078