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Income Taxes - Additional Information (Detail) (USD $)
6 Months Ended
Jun. 30, 2014
Income Tax Examination [Line Items]  
Gross liability for tax positions $ 278,000
Reduction in Income Tax Liability if Tax Positions Sustained $ 278,000
Income tax examination years description The Company is no longer subject to U.S. Federal income tax examinations for the years prior to 2010.
State Tax Authority | Minimum
 
Income Tax Examination [Line Items]  
Income tax examination year 2009
State Tax Authority | Maximum
 
Income Tax Examination [Line Items]  
Income tax examination year 2013