Description of the Company and Summary of Significant Accounting Policies - Activity in Company's Allowance for Doubtful Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Accounting Policies [Abstract]
Balance at beginning of year	$ 70	$ 140
(Reduction of) charged to expense	(15)	(72)
(Write-offs), net of recoveries	25	2
Balance at end of year	$ 80	$ 70