Income Taxes - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013
Income Tax Benefit [Line Items]
Unrecognized tax benefits	$ 689,000
Unrecognized tax benefits, interest	62,000
Unrecognized tax benefits that would affect the Company's effective tax rate	261,000
Changes in the amount of unrecognized tax benefits	$ 0
Cumulative pre-tax loss position	3 years
Scenario Forecast, December 31, 2013 [Member]
Income Tax Benefit [Line Items]
Cumulative pre-tax income position	3 years