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Income Taxes - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Statutory federal corporate tax rate 21.00% 35.00%
Revaluation of net deferred tax assets as a result of the Tax Cuts and Jobs Act   $ 2,558,859
Net deferred tax asset $ 6,633,539 $ 5,362,750
Unrecognized tax benefit $ 0