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Income Taxes - Additional Information (Detail) (USD $)
 6 Months Ended
Jun. 30, 2012
Income Tax Examination [Line Items]  
Gross Liability for Tax Positions $ 134,000
Reduction in Income Tax Liability if Tax Positions Sustained 134,000
Gross Liability for Tax Positions, Current 134,000
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 22,000,000
Net Operating Loss Carry Forward Expiration 2014
State Tax Authority | Minimum
  
Income Tax Examination [Line Items]  
Income Tax Examination Year 2007
State Tax Authority | Maximum
  
Income Tax Examination [Line Items]  
Income Tax Examination Year 2011
Foreign Tax Authority
  
Income Tax Examination [Line Items]  
Net Operating Loss Carry Forward $ 2,500,000
Net Operating Loss Carry Forward Expiration 2016