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Income Taxes - Additional Information (Detail) (USD $)
 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Income Taxes [Line Items]    
Income tax net operating loss carryforwards $ 117,000,000  
Net operating loss carryforwards related to foreign income tax 11,000,000  
Alternative Minimum Tax Rate 20.00%  
Net operating loss carryforwards utilized 16,000,000  
Net deferred tax asset 0  
Dividend from subsidiaries 16,000,000  
Federal income tax rate 34.00% 34.00%
Tax benefits and (liabilities), prior to any valuation allowances, related to stock option plans 214,670 249,423
End [Member]
    
Income Taxes [Line Items]    
Net operating loss carryforwards expiration year 2032  
Start [Member]
    
Income Taxes [Line Items]    
Net operating loss carryforwards expiration year 2018  
2018 Through 2022 [Member]
    
Income Taxes [Line Items]    
Income tax net operating loss carryforwards 3,200,000  
2023 Through 2027 [Member]
    
Income Taxes [Line Items]    
Income tax net operating loss carryforwards 59,900,000  
2028 Through 2032 [Member]
    
Income Taxes [Line Items]    
Income tax net operating loss carryforwards $ 65,900,000