Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013
Income Tax Examination [Line Items]
Operating loss, valuation allowance	$ 1,200,000
Gross Liability for Tax Positions	301,000
Reduction in Income Tax Liability if Tax Positions Sustained	301,000
Income tax examination years description	The Company is no longer subject to U.S. Federal income tax examinations for the years prior to 2009.
State Tax Authority
Income Tax Examination [Line Items]
Net Operating Loss Carry Forward	18,700,000
Net Operating Loss Carry Forward Expiration	2014
State Tax Authority | Minimum
Income Tax Examination [Line Items]
Income tax examination year	2008
State Tax Authority | Maximum
Income Tax Examination [Line Items]
Income tax examination year	2012
Foreign Tax Authority
Income Tax Examination [Line Items]
Net Operating Loss Carry Forward	$ 2,100,000
Net Operating Loss Carry Forward Expiration	2016