Quarterly report pursuant to Section 13 or 15(d)

Short-Term Notes Payable - Additional Information (Detail)

v3.19.2
Short-Term Notes Payable - Additional Information (Detail) - USD ($)
Mar. 10, 2019
Jul. 24, 2018
Mar. 10, 2018
Jun. 30, 2019
Dec. 31, 2018
Short-term Debt [Line Items]          
Short-term notes payable for financing insurance policies       $ 12,526 $ 124,213
Product Liability Insurance Financing [Member] | Short Term Note Payable [Member]          
Short-term Debt [Line Items]          
Short-term note payable $ 17,688   $ 28,915    
Interest rate 5.69%   5.09%    
Principal and interest first required payment date Apr. 10, 2019   Apr. 10, 2018    
Short-term notes payable amortization period 11 months   11 months    
Final payment date of short-term note payable Feb. 10, 2020   Feb. 12, 2019    
Directors' and Officers' Liability Insurance Financing [Member] | Short Term Note Payable [Member]          
Short-term Debt [Line Items]          
Short-term note payable   $ 215,575      
Interest rate   5.24%      
Principal and interest first required payment date   Aug. 24, 2018      
Short-term notes payable amortization period   11 months      
Final payment date of short-term note payable   Jun. 27, 2019