Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 27, 2015	Dec. 31, 2014
Schedule of Accrued Liabilities [Line Items]
Accrued compensation and benefits	$ 11,526	$ 12,798
Accrued warranties	2,400	2,309	$ 2,250	$ 2,719
Professional and legal fees	1,558	2,014
Other accrued liabilities	6,253	5,453
Accrued liabilities	$ 21,737	$ 22,574