Annual report pursuant to Section 13 and 15(d)

Income Taxes (Additional Information) (Detail)

v3.8.0.1
Income Taxes (Additional Information) (Detail) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Taxes Additional Information [Line Items]        
Federal and State Net Operating Loss Carryforwards   $ 76,000,000    
Deferred Tax Assets, Tax Credit Carryforwards   $ 2,404,490 $ 2,398,817 $ 1,823,661
Effective Income Tax Rate Reconciliation, At Federal Statutory Income Tax Rate   34.00% 34.00% 34.00%
Scenario, Plan [Member]        
Income Taxes Additional Information [Line Items]        
Effective Income Tax Rate Reconciliation, At Federal Statutory Income Tax Rate 21.00%