Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 27, 2015	Dec. 31, 2014	Jun. 28, 2014	Dec. 31, 2013
Schedule of Accrued Liabilities [Line Items]
Accrued compensation and benefits	$ 10,461	$ 17,544
Accrued warranties	2,250	2,719	$ 2,750	$ 2,364
Professional and legal fees	1,348	1,475
Other accrued liabilities	5,167	4,389
Accrued liabilities	$ 19,226	$ 26,127