Annual report pursuant to Section 13 and 15(d)

Income Taxes (Additional Information) (Detail)

v3.19.1
Income Taxes (Additional Information) (Detail) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Income Taxes Additional Information [Line Items]      
Federal and State Net Operating Loss Carryforwards $ 99,000,000    
Deferred Tax Assets, Tax Credit Carryforwards $ 3,035,384 $ 2,404,490 $ 2,398,817