Quarterly report pursuant to Section 13 or 15(d)

Management's Plans - Additional Information (Detail)

v3.19.1
Management's Plans - Additional Information (Detail) - USD ($)
May 15, 2019
Jan. 16, 2019
Dec. 31, 2018
Financial Support For Nonconsolidated Legal Entity [Line Items]      
Cumulative operating losses     $ 11,947,000
Convertible Promissory Note [Member]      
Financial Support For Nonconsolidated Legal Entity [Line Items]      
Face amount of debt instrument   $ 3,581,982  
Convertible Promissory Note [Member] | Subsequent Event [Member]      
Financial Support For Nonconsolidated Legal Entity [Line Items]      
Debt instrument term 12 months