Summary of Significant Accounting Policies - Summary of Warranty Reserve Activity (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010
Accounting Policies [Abstract]
Balance at beginning of period	$ 963	$ 1,009
Additions	262	52	600
Releases and/or charges incurred	(715)	(98)
Balance at end of period	$ 510	$ 963