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Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
Federal income tax rate 34.00% 34.00% 34.00%
Operating loss carry forwards $ 3,100,000    
Operating loss carryforwards expiration year 2034    
Valuation allowance for deferred tax assets $ 0 $ 0  
Unrecognized tax benefits $ 0 $ 0