Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Employee stock-based awards granted or vested	0	0
Options outstanding to purchase common stock	0	55,000	55,000
Maturities of short term and highly liquid investments	3 months
Minimum income tax recognition threshold	50.00%
Liability for unrecognized tax benefits	$ 0	$ 0