Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Balance at beginning of period	$ 345,000	$ 145,000	$ 145,000
Additional provisions and interest related to prior years	51,000	200,000	7,700
Resolution of matters during the period	(334,000)		(7,700)
Balance at end of period	$ 62,000	$ 345,000	$ 145,000