Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Accrued Liabilities [Line Items]
Accrued compensation and benefits	$ 12,798	$ 17,544
Accrued warranties	2,309	2,719	$ 2,364	$ 2,359
Professional and legal fees	2,014	1,475
Other accrued liabilities	5,453	4,389
Accrued liabilities	$ 22,574	$ 26,127