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Income Taxes - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Taxes [Line Items]      
Operating loss carryforwards $ 883,000 $ 756,000  
Valuation allowance for state tax net operating losses 108,000 122,000  
Unrecognized tax benefits 459,000 783,000 756,000
Potential increase (decrease) in income tax provision 500,000 800,000  
Audited refund claim for tax 300,000    
Possible reduction in unrecognized tax benefits resulting from audit settlements 200,000    
Possible increase in unrecognized tax benefits resulting from audit settlements 200,000    
Interest expense related to income tax liabilities 1,000    
Income tax penalties related to income tax liabilities $ 1,000    
Minimum [Member]
      
Income Taxes [Line Items]      
Operating loss carryforwards, expiration date Dec. 31, 2014    
Maximum [Member]
      
Income Taxes [Line Items]      
Operating loss carryforwards, expiration date Dec. 31, 2033